“The pursuit of FIRE is often a band aid for deeper problems. Chronic stress, burnout, depression and anxiety are all factors that could be triggered by work, but work is not necessarily the root cause. It follows that quitting (or retiring) is often not the solution.”

This makes no sense. Chronic stress and burnout are closely associated with working. Depression and anxiety are health issues that can often be exacerbated by working. In all of these cases ceasing to work, if you can, would be a very reasonable thing to decide to do.