I know some people browse the web while gaming, but I don't. For the gaming use case, I legit want a toggle that says "yes, all the code I'm running is trusted, now please prioritize maximum performance at all costs." For all I care this mode can cut the network connection since I don't do multiplayer.
I imagine people doing e.g. heavy number crunching might want something similar.
So, you are trusting all web pages you view? Because these are unknown code running on your box which probably has some beefy private data.