A lot of Bullshit Jobs[1] are going to be replaced by AI - it's not clear whether these "brokers" who can be trained with a powerpoint presentation are actually doing anything useful for society or even for the economy.

1: https://en.wikipedia.org/wiki/Bullshit_Jobs

Yeah but I mean...

My dog gets excited and barks to let me know whenever someone is at the door. It might crush his spirit if he knew he is just a useless pet and his contribution is meaningless.

If nothing else, it signals to people approaching your door that there is a dog they may not want to have to deal with.