Tools can be more or less automated. Using a CNC for example doesn't necessarily mean that I qualify as an aspiring machinist. Similar to AI a CNC happily carries out a course of action largely independent of the operator.

I think whacking things together with a hammer is the act of building (however inexpertly) whereas carpenter (and other titles) convey something about expertise, mindset, or the intent to hone skills. The DIYer might or might not qualify as an amateur carpenter/electrician/plumber/whatever.