I have to agree with yr right. In building my experimental so far I have been humbled and re-educated over and over again, and I thought I knew what I was doing because I have an engineering degree and had some time with airlines and aerospace.
Just because an aircraft looks like its built of car components doesn't make it so. I learned the hard way that quite often you do things the reverse of how you do them on a car - and for good reason. Bolts that you would wrench the crap out of on a car are given a gentle torquing. Galvanised wire is preferable to stainless for controls and so on and so on. Even the brakes bleed "the wrong way" compared to a car.
In my opinion there is no comparison between car mechanics and LAMES, the latter is a skilled expert. The former usually a mere spanner twister.
To put that another way, it doesn't take much to screw up or break something on an aircraft during maintenance you need to be really stupid to do the same to a car.