Preach! I was long in the habit of replying to "HALP MY CAR IS BROKEN EVEN THO LOOKIT ALL THE PARTS I'VE REPLACED!!!1!!!1!!!" posts by advising a stop to the money-spending and parts-throwing, and coaching on how to diagnose what's causing the problem(s). If I'd been keeping track, it would be many years since I lost count of times I've been told off and bіtched at for it.
Yeah and we still get that from time to time. When I get popped off at from suggesting they diagnose instead of replace parts, that's the end. I have a new person on ignore. ....and my list is pretty long. LOL