Fair enough! However you need to consider:

- Depending on your taste you will need to subscribe to multiple servics. Shows / movies I enjoy are scattered across Netflix, AppleTV+, Prime, Disney+. And it's increasingly unlikely that IP is licensed out (i.e. no Star Wars on Netflix)

- There is a surprising amount of movies which are not on any streaming service (at least in Germany) OR they are but you still need to buy a digital copy or rent

- The UX of self hosted solutions like for example Jellyfin or other open source can (surprisingly!) be better than the paid solutions. I.e. no ads & and no UX redesigns

I'm not opposed to streaming services at all. I will subscribe to them as long as it's value for money.

However in recent years streaming services got worse while self hosted solutions got much much better.

Your point - subscription is cheaper than self hosting - may still hold, but the balance has definitely shifted in favor of self hosted solution.

I don't think it'll become mainstream in the near future (or ever) but for me personally it's worth it!

It's also not "either / or". You can both self-host and have subscriptions, but maybe you can cut down on some subscription services:)