OK, I'll attempt to re-ignite this dormant but interesting thread.
The problem is that there is still more BAD advice out there. How can a beginning aquarist know which advice to take? Most will simply default to taking the advice of the employees who sold them the fish -- a bad idea since that person's motivations are suspect. How can advice be properly vetted?These days it really is not hard to learn about fishkeeping if you really want to. The internet is full of good advice if you look for it. I think the problem is simply that many folks think you just fill a tank, add filter and heater and fish, and that's it. The ones who really want to succeed at it have a wealth of knowledge available these days. The info is out there if you care enough to look for it.