It's probably mostly learned behavior; many westerners have the same reaction to eating things like chicken heart or fish eyes, which other cultures eat without

It's probably mostly learned behavior; many westerners have the same reaction to eating things like chicken heart or fish eyes, which other cultures eat without hesitation. That being said, usually insects being in your food is probably a bad sign (e.g. maggots in rotting meat), so there could be some innate skepticism perhaps?