@n0toose Yes, lack of software freedom is also a big downside. Though, many unlicensed streaming sites also require you to run non-free JavaScript code to watch; the same is even true of many torrent sites nowadays. However, it is to a lesser extent.
They serve you *more* ads than the authorised services, but Ublock Origin or other decent adblocker mitigates that and those services don't cap quality so your Linux computer will get the highest bitrate you can handle.
Most TV is garbage anyway.