I think a lot of founders would compare their startup to having a baby. Imagine if someone said “I want to have a baby but absolutely no waking up at 2AM”, you would be laughed at.

Likewise, lots of engineers in tech are compensated in equity so you have a stake in the business. in that case the lines on what constitutes personal time are less defined. I don’t see it as a bad thing if I’m on vacation and need to grab a laptop and help on an incident. I’ll take an extra day of vacation later or sleep in the next day. Life doesn’t have to be so inflexible.