As an audible customer I can tell you clearly that I often buy audiobooks by a particular narrator (discovering new authors) because the narrator is so good.
I mean, Siri is quite good at reading texts (I imagine that's a huge training corpus) but I think we'll be in "uncanny valley" for quite a few years.
It's possible that the public just gets used to that.
Same! I remember being really impressed by Justine Eyre in something, and then being a little disappointed to find that 99% of her work is romance novels.