I wouldn't be too hard on them - they just pitch what they've been told and often don't understand the different nuances between models. A Chevy dealer once tried to convince my buddy that he was *way* overdue for an oil change and serpentine belt for his... electric... Bolt.
As far as forums go, it usually helps to do some research in advance. "Has anyone done this?" will get different answers than "I was sold part xxx-xx-xxx for my power steering, but it doesn't appear to be serviceable and the part doesn't show my truck as compatible - am I right to return it, or is there a procedure?"
...and then there's the issue of this being a truck forum. I'm generally not on here unless I need to be. The forum for my track car did an in-depth analysis on OE vs aftermarket valve shims, meanwhile this forum tends to be more about how to remove fuel economy features which then devolves into presidential manipulation of gas prices. There's some useful info, you just have to lower your expectations a bit.