Explain setting up a Raspberry Pi to your aunt and have her tell me it's a low pricw. Let alone lineage os, Jellyfin, Smart tube, and whatever else was in your list. And that solves just casting and steaming. Now do email, messages, browser tracking and fingerprinting, and everything else in our lives... It a lot. And honestly too much.
Yep, I'm with you on that. I'm actually pretty tech-literate, and even I don't have the time/energy to bother with all of that shit. That's a lot of work and maintenance just for a single task that I want to be as idle as possible. Watching videos should just be two clicks, not studying and building and troubleshooting and updating and configuring a dozen things.
Yes, I understand that setting up a Raspberry Pi with LineageOS and other apps can be a challenge for many people. Protecting your online privacy definitely requires effort, especially when using different services. But even small steps, such as using alternative apps, can make a difference in increasing privacy. Even if you can't implement all the privacy suggestions, you can choose a few that are most important to you.
This is a long-term war that requires technical knowledge from us. Big Tech corporations take advantage of our lack of knowledge.
Information is power, and power is money. That's the point.
If your aunt doesn't care, screw it. Take care of yourself.