Often it works out that there is a substitute though - and if there isn't, I'm not convinced most would seek out movies in the way you describe.
I wanted to watch a BBC drama the other night and was offered the choice between paying to 'rent' it from Xbox, or watch it on iPlayer for free.
Assuming I do want to watch the movie, by the time I've found it, found that it's available on x cloud platform and will cost me y to subscribe / buy / rent - odds are that foo discovery mechanism has surfaced something I'd be happy to watch on something that I already subscribe to.
There are still substitutes, and I will gladly admit that it's rare for me to say "I only want to watch movieName, no other movie will satisfy me". It's much more likely that I'll want to watch something in a certain category. However, my experience that last few times I've looked through a Netflix category was that the overwhelming majority of the results simply looked like bad movies to me (and I've already watched the handful that actually looked appealing). When I play a music station, it's usually "good enough".
What I was trying to communicate that I am much more choosey about the movies that I watch than the music I listen to. I think this is because the enjoyment I get out of an activity that involves music isn't completely defined by the music. If the music isn't good, the activity can still be very fun. If the movie isn't good, it's very unlikely that I will get any enjoyment out of watching it.
I wanted to watch a BBC drama the other night and was offered the choice between paying to 'rent' it from Xbox, or watch it on iPlayer for free.
Assuming I do want to watch the movie, by the time I've found it, found that it's available on x cloud platform and will cost me y to subscribe / buy / rent - odds are that foo discovery mechanism has surfaced something I'd be happy to watch on something that I already subscribe to.