If you are skilled laborer then you are an investor. You are investing in yourself. Like all investments, there's a chance it doesn't pay off. If you fix horse carriages for a living but the automobile comes along and you no longer have a job then you need to move to a new career. If you can't find a job with your current skills, get some new skills. It's not my job to subsidize your investment loss.
+1
If you're invested in a trade that then becomes obsolete due to technological advancements, we shouldn't have to impede Human advancement so the guy who makes horse carriages can still make a living off that trade. He should look at the service he offers, look at the changing state of the world around, then decide whether or not he could still make a workable profit from his trade; if not, maybe he should think of getting into a new trade. There may still be a market for his horse carriages, albeit smaller than before. Even today you might still see the occasional horse drawn carriage, and they still need maintenance. People might still want to acquire his services if he can really fix up horse carriages to an exceptional standard.
We have digital watches these days, but some people simply prefer old analogue watches and there is still a small market for their creation and maintenance if your craftsmanship is good enough.