In all these kinds of stories that revolve around how much crap there is on Netflix, there are two things you have to keep in mind:
* Netflix didn't invent shlock and probably didn't even accelerate it; if anything, Netflix probably reversed the trend away from scripted and towards "reality".
* What distinguishes Netflix more than anything else is its efficiency getting content to viewers, which means that there's more of everything on Netflix, and in its catalog of originals. There's more schlock, which is very noticeable, and, compared to pre-Netflix-streaming outputs of places like HBO, also more solid original films. But 99% of everything is crap, so if the only way you have to engage with the Netflix catalog is browsing their interface, that's most of what you're going to see.
My breadth of viewing and thus my subsequent taste was extremely impacted by them. And I e yet to find an algorithmic equivalent (nor music or books).
But this is just a bias. Most of the video stores I ever used were garbage.
I presume soda fountains were the same but that didn’t stop my grandfather from bemoaning the loss of the soda jerk.