I believe most of us here aren't formally trained Financial Planners either, but there's a general consensus "Nobody cares about your money like you do, so figure out as much for yourself as you can." Wouldn't it be the same about your health? ...
No. For easy to understand reasons.
First, compared to medicine, investing is simple and almost completely static. All one needs to do is to find and read enough of a century's worth of studies and data that point to passive investing and thought-out AAs as the winning strategy. Pretty much one size fits all. The difficulty comes exclusively from the hucksters in the investment business using smoke, mirrors, and outright lies to obscure this simple fact and line their pockets. In some cases (12b1 fees for example) they are aided and abetted by the SEC. I am currently reading a somewhat old book: "
Unconventional Success" by David Swensen, acclaimed manager of the Yale endowment. Swensen peels the onion on fund fees and frauds even more deeply than Malkiel, Ellis, et al. It's worth a read even though some of his numbers are out of date.
Medicine, OTOH, is a moving target on the science side and is often quite patient-specific. A good doctor, backed by a good clinic, will be continuously monitoring (and sometimes contributing) to the science while using his clinical experience with hundreds of patients to develop treatment plans. He will also frequently consult with colleagues and take advantage of continuing education opportunities. Sorry, a bunch of anecdotes and internet links just cannot compete. ( Incidentally, one of my criteria for a doctor I trust is that I hear "I don't know" once in a while. It is the "Doctor God" personalities that scare me and that I avoid.)
Not picking on anyone or any specific post in this thread, but overall I am reminded of a psychological phenomenon called the Dunning–Kruger effect (
https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect), the gist of which is that the less a person knows about a subject the more that person overestimates their expertise.
Edit: @cooch96, in reading your question more carefully I realize this answer is a bit off the mark. I apologize. I would agree totally that it's a good idea to " figure out as much for yourself as you can." Reading quickly I took that to imply self-treatment as well as education. That's the issue this post addressed -- a bit off the mark. I am sure than any good doctor would want educated patients, BUT stopping at a point before the patient tries to overrule the doc. The advertisement of expensive drugs is a lab rat here. I know doctors who prefer to prescribe a drug specifically requested by a patient rather than to educate them about inexpensive alternatives or even that the drug is not needed.