We have a huge trades shortage and COVID might force a lot of supply chains to come back at least in part to the US. The demand for new construction has never been higher either.

A large portion of society that doesn't want to work on hot, dusty, dirty worksites might become obsolete with nothing useful for them to do. But there are absolutely jobs that are accessible to no-skill workers with only 1-2 years investment in schooling.

>On the other hand there will be a very large portion of society who will become obsolete with absolutely nothing useful for society to do.

Almost everyone has something to contribute. The problem is that society structured in a way where most forms of productivity are undervalued. A great example of this is art. Nobody in their right mind could imagine a world without art yet there's the stereotype of a starving artist. Burger flipper robots aren't going to make or break the world.

If we could automate their job and decide not to out of pity, they're still useless.