I think you are underestimating the amount of learning it took to be a good A/P not just turning wrenches but good at troubleshooting because you have being thru the schooling and learned the basis. You can learned at lot on the field including the bad habits of others and take them as your own or just a narrow view or knowledge that you need to have. I mean For powerplant I had to study how pistons work, magnetos, pumps then a little of how those engines work in helicopter and finally throw all out the window and learn how jet engines work. For airframe I learned to bent and temper metal, weld, and rivet and then oh let’s learn and make wooden wings with glue and fabric. General the one that like was said before meds everything and took me the longest learning series circuit , parallel circuit ,induction, and then phases plus faa regulations.
Not nocking on you but here in this sentiment is where GA is dying, getting that A/P license when I did it was everything to me and not easy, is not just turning wrenches if anyone thinks is just that then by all means go get it, become an apprentice or go to night school take the oral, written and practical and go take on a bunch of 20-50 year old planes some with just horrible maintenance I mean you wouldn’t believe the crap you find sometimes plus all the liability that comes with it (because now you touched it last so it must have being you fault) for little money and some owners that think you are always charging them too much.
Sorry I don’t mean to come out rude but trying to have you and others understand.