Sorry, Skippy, but no-one has said "we should fix our own cars", just that some of us have done so. And, you are right in that, if you don't feel confident of making a safe repair, then don't do it and put people at risk. As I said, I will attempt things like bearings, but anything else is out of my hands.
And, of course, in many instances you are simply not allowed to carry out repairs at the roadside, or, indeed, on the drive, other than emergency repairs and routine maintenance checks.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014