This alone is why 90% of people will not choose to work at a startup. You will work long hours, for crap pay, and you'll be waiting in line if there is an exit.
The odds of there being an exit worth anything to anyone other than a founder are small enough to not even worth considering.
If you are a founder you're gambling on your chances. There are ways to mitigate the risk but there's no sure thing.
Don't start a startup if you do not have the financial security to basically lose everything you put in.
Don't start a startup if you have family that depends on your income. You could choose to eat ramen and sleep on the floor of a college dorm room. Your kids (and CPS) might not appreciate it.
I agree the motivation is very important. I disagree that you cannot find the same motivation in a more stable organization (or can't motivate yourself). I recently finished reading, Extreme Ownership [0], and I bring that with me to work. People need to be responsible for outcomes: that's not unique to startups. You can also find that motivation internally and share it with your colleagues as you go.
[0] https://www.amazon.ca/Extreme-Ownership-U-S-Navy-SEALs-ebook...