The reality is that those people who FOMO you, don't have that lifestyle. They're simply marketers, but our brains aren't super good at seeing past that. And your friends? Sure, they go to a cool place once in a while individually, but you're just being exposed to hundreds of them all signaling at the same time. Statistically speaking you WILL see your extended social circle doing something cool multiple times a day. This used to be manageable in the 150 person village age. Bob got a new goat, son of a bitch.. oh well. But at social media scale our brains simply can't handle it.
It's analogous to how regular people don't realize just how much Photoshop and photographic skill goes into making someone look as good as they do in magazines and on their IG feed. We look at them and immediately conclude that we're some kind of a sub-human degenerate species compared to them, whereas in reality it's all bullshit.
It feels SO much better to swim in one's lane (basically JOMO), not looking around to see how everybody else is doing, especially when it's not real.
I'm not a religious person, but there's something really powerful in the admonition not to covet your neighbor's spouse, house, animals... which is what I sense my brain doing on social media.
The genius of IG is that it makes people willingly subscribe to hours of marketing every day. Zuckerberg got one hell of a deal on that company, 1 bil for it has to be the greatest deal of the century.