You ever do the thing where you use your mouth & lungs to suck the air out of a water bottle, and it scrunches up?
I used to think it was somehow, like, the force of me sucking the air out that was crunching it up?
I remember when I learned that, no, that's just the kinda insane pressure of the atmosphere we're at the bottom of. 1 kg per square centimetre crushing down on everything on land on this planet at all times. 😳