There's plenty of stuff that isn't listed there

Not OP, but yes believe it or not it's impossible to find certain movies anywhere other than pirating them. One example is "Pirates of Silicon Valley", I watched it when I was young and recently wanted to watch it again. I pay for basically all the streaming services, I'm would have been happy to rent it from any service at all. I spent several hours trying to find a way to pay to watch it and never could.

I'm pretty sure i just watched that via apple+.

But your point generally valid regardless.

This is an old relatively low budget TV movie, it's not on TV+ (which I subscribe to). Nor can you rent it on iTunes, it doesn't even show up when you search for it. Same for Prime Video, etc.

That link says "Content Unavailable" for me, possibly region locked? I changed the "mx" in your link to "us" but same error.

Ah, that's too bad for you.

its a great movie!!

Apple TV doesn't allow me to stream in my browser, so I happily pirate their content. I pay for all the other "big" streaming services that I can use like a normal person.

Who wants to rent? I have money, give me a file for money.

DRM is laughable anyway, if you give me the data I have the file if I really want it.

Let me, the consumer, legally purchase a high res copy of media I can own. Why is this so hard?

In most cases, in the world of TVOD (transactional video on demand), an item that is rentable is purchasable, but the reverse is not always true.

That is, the window for purchasing is much longer than the window for renting.

I'm guessing they can. They just don't want to.