There's no way under our current economic system that the result of a tool that makes some work easier/faster would be anything other than filling the gap with more or other work.

The amount of work left to do is massive if you stack up all the unsolved problems and potential R&D, like diseases with no cure of that we don't even begin to understand. We could choose to simply stop new R&D, but as long as there continues to be suffering from those unsolved problems it's in our nature to continue to try and solve them. And it's in our nature to prevent the free rider problem, where people expect to benefit from the solutions without contributing.