I have been following some of the "teachings" of FIRE, but as I turned 30 I started having my doubts.
I save >80% of what I earn, and I earn > $10k/month, but I'm starting to feel a bit unfulfilled. Especially when I see that my "energy drivers" are being with family and friends, and by focusing on maximising salary and career, it means I have to work far from home and be away from family and friends.
When I was in my 20's this was not a concern at all, but as people grow older and families expand, it starts to become a bit more questionable if this is the right focus.
So do really think about what gives you energy in your life before you go to this extreme.