I am not a competitive shooter (or Scuba Diver) but enjoy both sports/activities, including hunting. If it moves, is legal game, and tastes good....I eat it. I prefer to harvest my own food whether from my garden or my hunting property, and I am of the opinion that developing a food plot for deer and turkey is as productive as developing a garden where I grow my own vegetables for the table and for canning.
I own hand guns, rifles and shotguns. I reload my own ammunition for the hand guns, mainly due to the ever-increasing cost of "ball" ammo and because I got all the equipment and several years' supply of lead from my father, who also was a hand gunner. Sighting in a rifle or shotgun (even slugs for deer) is far less ammo-intensive than practicing with a hand gun, which requires frequent practice with hundreds of rounds to stay proficient.
I am also a Master Scuba Diver (NAUI's title, not mine) and soon to be a Divemaster. I find no inconsistencies with participating in both hobbies. Diving can be relaxing, challenging, engaging and a great way to spend time with family. Shooting sports offer all of the same benefits, in my humble opinion.
Shooting and gun ownership is in no way an inherently violent activity, any more than SCUBA Diving is. Guns CAN be used for hunting which some think of as a violent sport. OK I get that; disagree, but I understand the sentiment. SCUBA CAN be used for hunting...spear fishing, abalone gathering, seaweed collection, lobstering...yet (with the possible exception of spear fishing) few see these activities as "violent". For the diver who enjoys drifting, looking, and shooting nothing more than pictures and video, more power to you...I enjoy all those things too. But one can not deny that SCUBA offers the ability to harvest what the ocean offers in a way that non-divers do not share.
Similarly, shooting sports offer the option to shoot at nothing but paper, clay pigeons, melons and old cans. Shooting sports can, however, offer the chance to harvest what nature provides in a way that your average Wal-Mart shopper does not share. Is buying a pork chop, steak or frozen chicken a violent activity? Depends on how you look at it...SOMEONE killed that thing on your plate. Is gathering mushrooms or asparagus; picking tomatoes, peppers, cucumbers or beans violent? Depends on if you are the picker/gatherer or the plant I guess.
Many of the people with whom I dive are also gun advocates, though each for his/her own purposes. Being active and having hobbies are healthy past times. Choosing to experience nature as a hobby helps keep us connected to the world we live in. If you have never gone shooting, give it a try. If you have never been diving....well...why are you here?