That's the logic for high-demand titles. The reasoning for not making all the junk available at a fixed cost is the flip side: if users had a giant library of good-but-not-hit content, they'd be less likely to chase around their HBO or Netflix or whatever licenses.
Basically, we're going to end up with a streaming platform from every studio/distributor where you'll pay them directly instead of paying the broadcaster since the internet has made it so easy for studios and distributors to become "broadcasters" too. What seemed like a good thing at first is actually going to be worse in the end for consumers. We're going to be paying the same as before for each movie purchase/rental and then even more than before to license each show we want to watch.
The problem is that the experience of watching a movie at home only shifted a little bit during the transition from physical to streaming, while the legal and licensing framework between the two are so different they are hardly comparable. Copyright holders took great advantage of the change to a new format allowing them to redefine the meaning of licensing so that they have more control and can extract more value.
https://www.businessinsider.com/redbox-employee-buys-100-dvd...
There's a similar scenario where the last Blockbuster Video in Bend, Oregon restocks its DVDs by buying at Walmart, but it's detailed in one of the documentary videos about it that the manager of said Blcokbuster has a special off-the-record arrangement with Walmart management.
Even now, any film display outside of the home still requires a public performance license, the studios have just decided to put their efforts into enforcement on the location and business side, rather than the supply/sales side.
I don't think that is right. The first sale right is a limitation of the copyright holder's distribution right. This right was first recognized by the Supreme Court in 1908 and was clearly established by the time of video rentals. Video tapes were initially priced very high as the studios were selling to the rental stores, but eventually the studios simply found they could make more money selling copies to individuals and the prices came down.