I respectfully disagree. Alot of jobs plumbers do is that kind of easy jobs (just like most software devs are really writing CRUD apps.) Even redoing old plumbing in the house is super simple - soldering copper pipes with all the tools available is very straightforward.

I will say the same about welding. After very little reading i was able to make my own tig welder and even modified it later to weld aluminium (which requires AC vs DC normally, and spark starter)

This all information is readily available on internet if you know how to search for it. And that's what today's software developers are good at - finding quickly solution to something unknown.