People I know already do these home-haircuts as a business. They dont make money because its deregulated and every so mildly illegal, mostly from tax evasion.
I say deregulate everything reasonable, stop trying to nake everything a nanny-society and micro-managing every last bit of compliance, and let the chips fall where they may! Let responsible adults live their lives. People self organise and figure most things out for themselves if you just let them.
If kitchen hairstylists outcompete hair chains, I would be surprised but also not too worried - hardly the end of civilization at risk. But locking people artificially out of jobs and artificially inflating almost all everyday expenses for consumers are pretty big enshittifications, in my opinion.