Other have said it, but the reason for all the c-cards is.....
$$$$$$$$$$$$$$$$$$
Actually, there's some truth to that ... all those C-cards do cost money.
But ...
and even though it would seem to make sense that someone that jumps into the water with stuff strapped all over themselves with the intent to breath underwater, would understand that it could be dangerous, but thanks to lawyers, they saw a perfect thing to sue dive shops / boats / whatever attached to it when someone decided to try something with out 'training' and I'm guessing won, so they started coming up with all these c-card$ so they could say 'well they had the training and should have known better'.... It's a shame that something that basically says "what you are going to do could kill you, and you sign that you know that, and it's not my fault if it happens" and a signature isnt enough.
Weeellllll ... not exactly.
These threads always boil down to the same thing ... "Back when I got certified 40 years ago we had to swim 12 miles and do 100 pushups wearing our scuba gear. You young punks got it too easy, and your training is inadequate." It's the same yearning for the good old days that happens in every human endeavor when old people get to the point where they can't remember how it really was back in the "good old days" ... so it must've been better.
I've dived with a lot of those old-timers, and yanno what ... they ain't all that. Most of them have bad habits I broke myself of after only a year or two of diving ... because I was smart enough to take a class and learn a better way.
Back in the old days you didn't take all those classes for one reason ... because they weren't available. You either learned from someone with more experience than you, or you learned the hard way. Sometimes you didn't get bent or injured in the process ... but a lot of the old-timers I know have been bent multiple times.
Diving mentality today is different ... diving's not the exclusive domain of adventuresome young men ... it's more the domain of well-to-do middle-aged people who have the means to participate in it. The claim that young people are the reason why classes are broken up into smaller chunks isn't borne out by the numbers ... there are probably more 50-somethings in diving than 20-somethings. Those people have jobs, families, and several other recreational pursuits. They don't want long, drawn-out classes ... they want to take it in smaller, easier to schedule bites. It works for them.
I get so tired of these threads that criticize everybody who isn't like you. Yanno what? If you're one of those people who's been diving for 40 years, and who has done it all with nothing more than a single OW card, you have my respect ... I wish I'd taken it up much younger in life. Now shut up and go diving ... and leave the rest of the diving community to pursue it in the way that best suits their lifestyle and goals.
Some folks LIKE taking classes. Others learn best by doing. Whichever works for you, do.
... Bob (Grateful Diver)