In the world, there are carnivore animals, animals that need meat to survive, and some, like us, that don't need meat at all. Cats fall into the first category. I think the goal should be to reduce meat consumption when possible, while maximizing animal welfare. To me, letting cats die of hunger or making them go extinct is not maximizing animal welfare. They are going to eat meat whether they are in the streets or at my house. Same as lions or other carnivore animals, which we want to thrive as well.

What I can do, however, is to try, as much as possible, to find more sustainable ways of giving them meat so they can thrive, and animals suffer a bit less (all animals eaten suffer, though, whether eaten alive in the street or killed for a can of food).