I'm not sure why I would care whether or not someone else takes up fishing at all.
It is basically a solitary pursuit, if you bring a buddy along to socialize fine but socializing isn't fishing. It's socializing. You can do that over a beverage in your backyard, you don't need to be in a boat with a rod in your hand casting to do that. Sure, you may enjoy the time hanging out with your friend, but that isn't the point of fishing.
And I really don't understand this mentality of "introduce more people to fishing, it's the future of the sport." Really? So we have to have a bunch of people with rods in their hands for the fish to be in the water? We need people doing it for it to continue? Reservoirs and lakes will wither and die if we don't have thousands of people fishing? Seriously?
I can pretty much categorically state that our natural lakes and rivers, along with the man made reservoirs would be much healthier, safer and more enjoyable if less people were interacting with them, not more. If you are going to make this about the health of natural habitats, keep people out, not attract even more to tear stuff up.
I started fishing with a zebco 33, a hook, a sinker and a bobber and a coffee can with worms in it I dug up in the back yard at a pond next to our house. Catching catfish and bluegill. I graduated to better stuff and now have a boat and whatnot. But its not like any portion of my enjoyment of my fishing past time is reliant on other people doing it. Or the condition of the places where I go to pursue that past time is in any way improved by more and more people being there with me.
I'm not selfish, I am happy for everyone to pursue whatever activities they enjoy. But I just don't think that fishing or the places where we go to enjoy it in any way are dependent on, or improved on, by having ever more people there doing it.
In fact, I would have to pretty much agree that if you want to ruin the pleasure of fishing for future generations, just keep expanding the amount of people doing it on the limited amount of lakes there are on which to pursue it.