I won't say my age, just that I have 46 years experience being 18.
When my generation grew up we had limited choices, we only got 2 TV channels reliability and another one about half the time, we watched when it was broadcast and if we missed it we missed it. Today a couple hundred channels, DVRs to time shift and you can always watch Netflix, YouTube any time. Much more choice.
Kids in my generation were much more free range. I was told get out in the morning, don't come back until lunch unless you are bleeding but have fun. (Later it was unless you cannot stop the bleeding yourself.) Today mothers are charged with child neglect if their kids are in the yard and they are not right there with them.
We had to make a lot of our own fun. This lead to organizations like the Boy Scouts being massively popular. Just about every kid in my cohort was in either Scouts or Guides ( Girl Scouts for you Americans). As a Scout my patrol would actually plan and execute our own camping, we would decide and make the plans and get permission and go. Permission was as easy as just telling our Scouter and parents we were going and we were never turned down. Three day backpack hikes where we would not see an adult were our norms in the summers.
Today Scouting is almost non existent. 25 years ago I was a Scout leader and the rules in place for even a simple outing are overbearing, multiple written permission forms, rules about what age can go how far from civilization, adult to youth ratios to be maintained, cell phones mandatory. etc.
We boomers have created a culture where there is a threat being every shrub and tree and tried to keep the kids safe, result they were at home on a screen of some description and never learned the joys of facing and defeating a hardship.
Younger people face a gig economy, life is not a career where they put the effort into it and over the long run have a satisfying comfortable and secure life. They have to float from gig to gig, never sure if a bad review and reference will stop them from getting the next gig. They tend to be more afraid to commit to anything simply because the world does not commit to you. Much easier to commit to a career if you know in the long run it will pay off.
They want to sample more of the variety out there. Where we wanted to become divers, they want to do diving. We identify as divers, work towards being better divers, they are just as happy going parasailing, sitting on the beach, taking the guided excursions on a vacation as they are going diving.
Diving has to compete as just one of a wide variety of activities that are available to the younger generation.
We see young people who dive after the resort course in the pool and naturally they do it badly, they are not trained , buoyancy control is awful, and they get discouraged about it pretty quickly. I have also seen older divers make disparaging remarks to new younger divers about kicking up silt, ending the dive early due to low air etc.
It is no wonder that faced with the resentment of older divers, many other options available to them for entertainment, low financial stability because of the gig economy, and a culture of low commitments, that they do not want to fully commit to an activity like diving.
As divers we can encourage the younger generation to partake in the diving, Don't rag on them for kicking up silt, tell them politely that they might want to try a frog kick because it helps not only with visibility but is less effort and uses less air so it is a bonus all around. Then demonstrate it for them spend a few minutes on the next dive helping them learn it and just perhaps they will become not only better divers but will enjoy the sport more and return to diving more. Don't yell at them for dragging their console in the mud, show them how to tuck it in and become more streamlined.
Dive shops need to adopt a better, more friendly to new divers, business model. When I took up diving I asked about the difference between the $1,200 complete gear set up and the $2,000. I was told $800 and the dive shop owner laughed and went back to talking with his buddies about last weeks dive. I simply said oh, my budget was $3,000 and walked out. ( That dive shop is now closed.) I still see that sort of attitude in some dive shops.
Take the time to explain, in a positive way anything that they ask about diving. Don't laugh about them when they say that they are scared of sharks, tell them that sharks are rare in most places and generally you have to go out of your way to find one. Even then you only find sharks that pose no threat to humans.
Tell them about the wonder that you have seen. My favourite dive story is about my first night dive. My buddy and I stayed on the bottom until the other buddy pair got on the boat. They were back lighted by a full moon and the luminescent plankton gave the illusion that they were swimming in the milky way.