It will. So has just about every other major technical development ever. Eventually those lost jobs should be replaced by even more jobs made possible by the new technology, but in the meantime it will suck.
Thats how you know its not just a gimmick. How many jobs did blockchain replace? Just about zero. How many jobs did computers or the Internet or the mechanical loom or the freaking steam engine replace? Tons.
Im pretty sure most of us already have to work our whole lives or starve.