@jacob:
I question your assumptions yet I follow your conclusions.
I think being FI provides more optionality than not being FI. If one can effortlessly become FI, it is better to be FI, assuming one prefers more option to less options.
My interpretation of what you wrote is that FI is a state that once reached is drastically different than when it is not reached. My counter is that as one approaches FI, one approaches the benefits of FI. The relationship between FI and optionality is not a strict threshold reached when one is at 3% SWR, but rather a continuum where optionality increases along with savings.
I don't believe that 3% SWR is a magic number where one puts the idea of money totally to bed. There will always be tail risk and that tail risk can only be reduced. As such the worry never goes away and the number one is comfortable with comes down to temperamental risk tolerance. My point here is that the money issue can not be said to be totally solved for everyone at 3%, for some it will be less, for some it will be more and for some it will never happen.
I also don't believe that maintaining employability or being employed necessarily takes up much space or life energy. There are a number of not that skilled positions where someone with ERE level spending can pay their expenses and save working 20 hours or less per week. There are also (fewer) higher skill positions where a person with ERE level spending can pay their expenses and save at a high rate, working 20 hours or less per week.
Of course my favorite solution is to mix and match, being employed with as low friction as possible for as much money as possible, taking freedom as one wants it. I argue that whether or not someone takes up a lot of mental space worrying about investments or worrying about where the next job will come from comes down to individual temperament, preference and skill set.
I do appreciate that not working for 20 years is a fundamentally different state than working for even 1 hour a week for 20 years. This state change can lead to insight (such as "working for money is actually pretty fucking odd") that people working even 1 hour a week will not see. Thankfully we have several people here who do not work at all to have these insights. I think it is possible to apply this wisdom ("oh, working for money is pretty fucking odd") once on hears it, even as they continue intermittent work
As I said in the beginning, I think being FI is great, in that it opens up more options, which I think is positive. However, FI does have a price and is not a slam dunk guarantee. For some the price to get to FI is small, the methodology of the 3% rule is trusted and the payoff for getting to FI is great. For others the price to get to FI is high, the methodology of the 3% rule is not trusted and the payoff from being completely FI is small.
This comes down to whether one values the kind of optionality FI provides or optionality on the way to FI more.
What makes any path easier is having extremely low expenses. Where temperamental options apply, having a thoroughly planned WoGs will aid in decision making and increase robustness of and confidence in the outcome, which will in turn minimize the friction of having the resources to get what you need and do what you want.