Every job will be replaced (or change dramatically) on a long enough timescale. That's always true.

The question is the timescale. I believe many blue collar jobs are in fact safe for a while, because humans will be better at those jobs for some time yet. (A decade or two?)

For example, I recently needed a semi-truck trailer refrigeration unit fixed overnight. This involved a technician climbing around the opened unit (a combination of diesel engine and HVAC unit) and physically doing diagnostics, electrical and mechanical checking, pulling and replacing bad parts, "get your hands dirty" technical work.

I find it difficult to imagine even the most advanced currently-existing robot or AI to do this work. That would be deep sci-fi territory. Or at some point this type of mechanism won't be around to need repair, but there are millions of them. They aren't disappearing overnight.

This is not true of every blue collar job. It is likely true of some, or many. Regardless, many changes are coming.