If the user experiences stuttering while decoding a video, they won't learn to enable special permissions for the website but instead switch to a different brow

If the user experiences stuttering while decoding a video, they won't learn to enable special permissions for the website but instead switch to a different browser that hasn't yet implemented this "feature". And most websites most users visit will need the GPU to be remotely usable. For them enabling specific permissions for every website they visit is very inconvenient.