What is something that only exists because people are stupid?

packaged pre-peeled bananas

Trump

Organized religion. Prosperity gospel. Televangelists. Tucker’s career.

Trump presidencies

Trump and the American Nazi Party

Specific models of dumpsters found in national parks. Apparently making sure that the smartest bear can't get into a dumpster while making sure the dumbest person can is a grey zone.

I'm gonna get downvoted for this but... gaming consoles.

Gaming consoles made sense back in the day before home computing took off, and for a while they actually had superior hardware than computers when it came specifically to running games. But nowadays gaming consoles are just locked down user-hostile computers with a subscription service attached. The gaming equivalent of inkjet printers. It's an industry made irrelevant by advancements in technology, propped up by misleading marketing and artificial hype that sadly many people fall for.

Shops with perpetual "sales" and prices ending with 99.

Lotteries. If people understood odds they'd never buy a ticket, or at least not in the numbers they do.

Homeopathy and alternative medicine.

Racism Sexism

Any brand of authoritarianism.

Microsoft Windows

My high school mandatory epilepsy training for teachers and staff because the art teacher stepped over me while I was seizing on the floor during class. Other students had to carry me to the nurse because I couldn't walk right after the seizure. Teacher wouldn't even call the nurse to let her know what was up