Sure, but the issue is that employers will try to replace non-replaceable jobs along with the replaceable ones. Eventually employers will figure it out and hire people again for the non-replaceable jobs, but in the meantime, real people with real lives will suffer

The problem is the "race to the bottom". Sure, some grindy desk jobs can gladly be taken by AI.

What about the jobs that AI does poorly, but when the low cost is taken into account it's still seen as feasible?

Think of all the horrid DTMF phone menus and barely functioning voice recognition systems. We hated these as customers, colleagues, anyone who had to use them despised them

Cheaper than a receptionist, though.

Now imagine that level of frustration and poor service spread across every industry at every level. We're talking about a total collapse of productivity across the entire economy. Not only do people lose their jobs, but the work isn't even getting done to any standard, either.

Fully agreed. The main holdup is compensation for people, such as universal income.
Not everyone can throw the towel in on a boring desk job and become a rocket surgeon.

Sure, I guess we don't need writers, painters, visual artists, musicians and filmmakers. I mean, what do they do really, enrich our culture and move our souls? Pff, AI can do that easily.

That's just it. A century ago people thought that with the rapid development, we would not have to work anymore. So that didn't happen.