Lazy devs don't understand what scaling is. They advertised this game as Steam Deck compatible which has a way weaker CPU, GPU, storage (most people are playing on an SD card), and most importantly memory bandwidth. This game runs perfectly fine on PCs with slower CPU/GPU combos than the Series S. It's literally just laziness and knowing people will just accept their shitty excuses.
Well actually, your login info never goes to them at all. You log into the sites directly in a webview and it uses the cookie to sync your subs and recommendations locally on your device.