Along with crops grown and fed to bugs, after all, they need to eat to grow.

There will also be crowding, bugs feeding a country aren't going to be wild harvested, how would you even do that, and we'd need massive quantities.

So disease would be a thing.

And we'd need massive amounts of water too, and we'd have massive amounts of leavings, just as with cattle.

Any "but we can just" scenarios, like using their leavings as fertilizer, can also be done with cattle.

Some bugs are likely smarter that the cattle I've been around, and they feel pain, so what of the bug activists? What of the queen, and the hive mind?

Are we going to claim we know that they aren't feeling pain from crowding, or their situation?

What happens when we harvest in the same area over and over, a massive building just for this? Bugs excrete chemical warnings to communicate, and poison during stress, will these all build up month after month of harvest?

There are endless questions to be resolved, but all I hear is "well we can just...." eat bugs, with no other validation or justification about scale, safety, etc.