Because its convenient for them. For people who only have a phone Netflix for $2 or so a month is great.
Where I live, I would still need to pay for a VPN to use torrents. I’ve been banned from an ISP before for torrenting (thankfully, I had multiple ISPs available for me).
At the moment, I just “pay” legally because I get a few “free” streaming plans from my mobile provider and ISP. Occasionally, I just use a free streaming site if I really want to watch something that’s not available to me. Every once in a while, I try anonymous p2p such as Tribler or torrenting over I2P, but it’s still extremely slow, unfortunately. I’ve never used Usenet, but I think it’s about the same price as a VPN or seedbox would be?
Get into a private tracker, or rent a VPS in a country that doesn’t bend to the whim of capitalism, torrent to that vps and stream or sync it locally. I find that to have more peace of mind than using a vpn w/Killswitch.
To get into a private tracker you need to have a good seed to leech ratio, and to do that you need to upload a lot, which is what gets you on the ISP hitlist. This solution is by definition not useful for people in countries where the ISPs enforce no torrenting