I truly appreciate the grand experiment that is Netflix, where they take all the money in the world and try and make all the different kinds of entertainment in the world, for all the people in the world, all while operating at a loss.
Pretty amazing. Sure they could have a better batting average, like HBO. But HBO is playing a different game, they are doing quality first because they have limited broadcast ability anyways. That will change though when HBO Max takes hold (if it does). Its streaming vs a cable network atm.
There is a problem Netflix can't seem to get quite right yet though, you are right. They shouldn't start shows they don't intend to see through, unless they absolutely tank. The 'OA' did not tank at all. Sense8 didn't tank. Sure, both of these shows were very expensive and pretty niche sci-fi head trips (my favorite kind). But I say if you start something and it has a dedicated audience you need to allow the show to play out, like a 3-5 season minimum.
Of course, we are spoiled at the same time. Network TV has been cancelling good shows for mediocre shows for decades. For all the same reasons - money, lack of viewers and marketability. A formula I think Netflix is still perfecting but only like 50% there. Still, not bad for a company that produces more film and TV than I believe any other in the world. So I try and cut them some slack. They still do make so many great shows and even the rare great movie.