> won't it mean that people actually get art worth their time?

It optimizes for local maxima, rather than taking the risks associated with finding larger global maxima.

Or, in other words: It creates lots and lots and lots of pretty-good stuff of particular types with broad appeal, rather than allowing diversification into some stuff that appeals very strongly to group A, some other stuff that appeals very strongly to group B, etc.

It makes the publishing/Netflix executives richer, but our culture poorer.