It's called being a sucker. If you're salaried, you should be leaving productivity on the table. You get paid the same no matter what. Finding the line is key.
Years ago (around when I started working remote) I started quitting at 1pm every day. And then I started never working Fridays and even some Thursdays (I plan my week so I can push some "leftovers" those days to look like I worked).
I use the spare time to sleep, play with my pets, found businesses, learn new skills, enjoy my marriage to the fullest.
Also I don't have to give my best to stay employed. I have some factors working in my favor. It costs money to replace me. And it costs time to get someone to my level of onboarded. I've never given my best but they keep paying me 100s of Gs to do it - so I think you're off-base on that point ;)