> Personally I strongly reject the idea that labor displacement is unethical.

Oh, well if you STRONGLY reject it I guess that's it.

> It will be a serious problem to deal with, but that doesn't make it unethical.

What WOULD make it unethical?

> The steam engine displaced labor. That doesn't make it unethical.

The steam engine also created new jobs to replace what it eliminated. It wasn't a mostly one-sided wealth transfer to the elite.