Three good reasons why I still do my own repairs.

And the vehicles they fix are on the road with you, me, my wife, my family....
Yup. Yet some people think flying in small planes is unsafe yet every commercial built plane needs to be annually inspected (and not just kicking the tires) to be insured annually. However, depending on the jurisdiction, vehicles dont have any inspections or do but they are Mickey Mouse, and those same people don’t realise the car next to them doing 60mph might have no brakes, bald tires or loose wheel nuts or all three! So much more dangerous driving on the road than being in the air.