There are private companies out there already providing these types of facilities. They are making a profit.
Yes, there are. I was taken to one many, many times as a kid. That particular one was Farnsworth Trout Club. Chicken wire at the bottom and top of the club water, private hatchery, they loaded a small stream with fish and an especially high % of larger fish.
Here's the thing. It wasn't full of mullet haired/shirtless men with a Marlboro red, PBR hat, and a stringer full of fish.
It was full of..... KIDS (though, granted, sometimes their parents were mullet haired, the last time I was there was in the 80's!).
And I'm not talking teenagers. We're talking 5-10 year olds here.
Look, groomed banks, tons of big fish, easy to catch, so that a kid can reel in a trophy and then take it home and brag to his grandparents? Yeah, this isn't a terrible tragedy. It's how you get kids into fishing. Once interested, those kids become teenagers who seek out more difficult situations.
I probably would support some sort of "must have kids with you" restriction in such places, though I'm not sure whether it's necessary or not since I feel it'd turn into that anyway. I just can't imagine adults enjoying this on their own. That said, I can't imagine adults hunting in deer farms that advertise a 100% success rate either, but they do. Maybe I have too much respect for the public?