Man, you must hate those handymen who put up YouTube videos showing how to do basic home maintenance. A truly class-conscious handyman would insist that the homeowner hire them to replace a light switch.
There certainly exists a class of electricians who believe that homeowners shouldn't be changing a light switch, and jurisdictions exist where a permit is required to do so.
Come on, are you really going to strawman "engineering should be inherently disqualifying" into "so people shouldn't DIY in their own home"? Please try a little bit harder.
How this is equivalent at all? The proper equivalence would be "You should be happy a random passerby decided to re-wire your home after watching a youtube tutorial and thank him accordingly".