Earlier quoted context omitted.
Here are the magic words in US Health Care: "What is the cash price?" It's usually less than you think and often worth avoiding the insurance company hassle. Then you can just get reimbursed with your FSA or HSA anyway.
FSAs are insane, conceptually. "Guess how much money you're spending in a year on healthcare! But beee caaareful: if you guess too high, YOU LOSE IT" I still used mine while I still had access to one, but it was grumpy-making and was usually almost more trouble than it was worth.
Combined with the PITA level, there's no way I'm doing it again. I can't see how it's worth my time. One of these three options is very likely:
a) my income level is low, so every dollar counts, but my marginal tax rate is also low, so spending a ton of extra time on this is not worth saving ~ 15% on taxes for health care
b) my income level is high, so my marginal tax rate is high, but saving 40% of taxes for health care is not worth the time, because health care is not a meaningful amount of income
c) my health care spending is high relative to income, and I can deduct health care costs on my tax return. Then I can deduct a lot more than the FSA will reimburse for, and the records don't need to satisfy a third party, unless I'm audited by the IRS.