We do if we went globally more efficient, and eat less beef/pork and less sea-caught fish.
Even the Salmon price went up like crazy lately, mass-farms are vulnerable for extreme temperature shifts, both in sea and land, and hot and dry.
Insects are already on the menu outside the western world by at least 2 billion people.
Beef isn't efficient to grow at-all, usually the larger the animal the longer it takes to grow/birth etc.
You have to put a lot of resources in for 1 kg of tenderloin, compared to 1 kg of mealworms.
Yes I am PRO-insect, I don't see a downside when it comes to mass consumption. Of course luxury products/restaurants can still exist.
All those climate campaign dudes can reduce CO2 massively by replacing all those cow fields into forests or wind/solar panel farms or whatever.