Plumbing seems like a relatively popular AI-proof pivot. If AI really does start taking jobs en masse, then plumbers are going to be plentiful and cheap.

What we really need is a lot more housing. So construction work is a safer pivot. But, construction work is difficult and dangerous and not something everyone can do. Also, society will collapse (apparently) if we ever make housing affordable, so maybe the powers-that-be wont allow an increase in construction work, even if there are plenty of construction workers.

Who knows... interesting times.