No food is “problem free” and, much like normal agriculture where different crops cause different problems, different meats (poultry, pig, cow) cause different problems and have different costs.
Are insects a valid protein source? Apparently yes! Am I willing to eat them? Maybe! I’ve never had the chance to try any, none of the markets I go to stock anything like that.
Ditching all meats for soy and other vegetal proteins? Doable, but more expensive than eating chicken or pig, in my case. Fully getting rid of eggs and milk is also problematic for me because they are even cheaper than the meat itself.
You know what would be really funny? If cattle ranchers were forced to come up with big diapers for all the cows, harvesting the methane and turning that into somewhat cheap extra gas for cooking.