To be honest, a block like that only affects normal users. Criminals or people who really want access will not have any difficulty finding a way to access discord.
I think it is a tactic to get discord to follow the rules, not to actually limit harm.
Regarding your gaming point. Look up „game porting toolkit“ it is a native tool from Apple which lets you play most windows games on an ARM machine seamlessly.
A lot of people already have iPads mounted as interfaces. What is missing is the right software (always on display or proximity wake or stuff like that)
Do you have an example for a desktop app that would use these tokens?