Oh I get it. But not everyone has the aptitude, the tools and/or someone to teach them. Brakes and rotors aren’t too tough, and I taught my son and helped both my SILs but not everyone has that. I did ball joints a long time ago, starters, an alternator… but my dad helped and that gave me the confidence to attempt other stuff. But one expensive mistake can really cost you too and can discourage people from trying again.