the 'ejector seat savings' the GP was referring to just means 'have enough savings that you can walk away from any situation if you want to'. GP probably wasn't meaning 'walk away from all work forever'. I can say in my case even when I qualified for unemployment assistance, it was pretty small, and took a couple weeks for me to even get a check, then another few days for the check to clear. Mind you this was 15 years ago - the situation might be 'faster' now, but... having savings now means I wouldn't care one way or another, but at the time, I had very little, and it panicked the heck out of me not having a 'regular check' coming in.
25 years ago, I was earning... about $700/week. The upper cap on unemployment assistance paid out around... $300/week (and I didn't even qualify for the full amount, IIRC). I had been earning $700/week, but then had to wait close to 3 more weeks to get a check from the state for around $200. It wasn't close to a sustainable situation.
https://fileunemployment.org/unemployment-benefits/unemploym...
I'm in a position now where I have ... probably 18 months or more of living expenses lined up that I can tap whenever I need to, so I don't think I'll ever have to be in that situation again. BUT... I still remember have $0, owing money, having no job/income. Scary as a single person, probably doubly so if you have a family to support.
Having 3-9 months of fixed expenses money in the bank is pretty liberating. You know it's there and available, so your attitude at work becomes less about "OMG how am I going to pay my bills if I lose this job" and more about actually accomplishing something.