(edit for clarity: I'm ignoring the reality of current self-driving tech/safety for the sake of the philosophical argument) it's cheaper and faster to fire truck drivers and then hire the folks who can run the dispatch/diag/driving software - even if (philosophically) we should want to redirect drivers' skills/experience and retrain them, there's no economic incentive. So, utterly reasonably, unions and labor organizations and the general public push back against wanton job cuts and firings-due-to-obsolescence (though this is not an america-unique problem). I think largely as a species we've yet to crack the code on "hey this wave of tech is going to make X obsolete, maybe we should account for the folks doing X" - certainly one of the weak spots of free market capitalism.
Yea totally, earth spins much faster these days and its difficult to keep up. Numerous studies have shown that, past a certain age, retraining is almost pointless, younger folks still have a chance. But, no matter what, we need to push back against bad faith stuff like this, while we figure out our social problems.