Well, beef / lamb / salmon are exorbitantly priced and most people cannot afford to feed their families, if they even understood it's nutritional value.
There's way too many people on the planet, hence the bugs.
Hopefully, AI will come up with lab meats that taste as good as real meat and is just as healthy, otherwise we may be headed down a path where bugs are the only source of protein available.
Meat has been banned before in some countries throughout history. It could happen again.