I don’t think that’s true of either. They’re not saving all this video in RAM. Steam’s system even asks you during setup to choose a temp folder for the video to sit in until you choose to save it as a clip. I don’t know when it flushes that cache, but I’m assuming it doesn’t and simply overwrites it when it runs out of the allocated space to allow you to go back and save something after you close a game.
I’ve genuinely never felt the need, but I also don’t post for clout or proactively, I’m more of a reply guy in that I prefer the version of social media where I talk with people rather than at people and I do not give a crap about followers, upvotes or starting popular threads. Believe it or not that tends to do a lot to minimize the use cases for blocking, in that people rarely take the time to chase me around or specifically target me, even when things get heated.
But hey, if somebody is bothering you block away. I don’t have a moral stance on it.