@Ross at Play
But it does not necessarily mean some of these wackos are not very helpful to others. Many are attracted to the field BECAUSE their wackos, but it's only themselves they cannot help (or very often, they are using helping others to avoid looking at themselves).
If I may, it's not only that. Often, to truly understand a mental illness, you've got to be familiar with mental illnesses, and all the permutations. An outside observer is more likely to say "That's not related to the condition, it's a minor side issue", when they're all aspects of the same condition. Thus the wackoos might be better qualified. The caveat, is you've got to select a shrink who suffers from the same condition as you, even though they're not allow to declare they suffer from it. It's the perfect catch-22.
On the other hand, that's the entire history of psychiatry. The field was invented by Freud, who rejected his own hypothesis (about mental illnesses being the result of sexual assaults), after he discovered his own family was being victimized by his own father. Which is the reason why the field languished for so long, because it was built on a false premise, with everyone afraid to questions its roots.
Basically, it's best to get advice from people who have successfully waged their own battles, but you really can't trust anyone who won't admit to their own failings, while any field will freeze out anyone who admits to basic human frailties. AAAARRRGH!!! That's when getting coping advice from others in forums like this is more helpful than going to a profession dedicated to helping you.