No, you would also need to run on computers of people not understanding what is going on.
In the same way as running
> rm -rf /*
on computers of people not understanding what is going on (or not agreeing to it) and where you are not allowed to do so is illegal, for quite good reasons.
How are you supposed to confirm "user understanding"?
Does the program need to require a tutorial/training before it's being used?
A user's ignorance shouldn't be a software distributor's problem.
If the discord app didn't have a system tray, and hid it's process from the Process List someway, maybe you have a point - this is just ignorance across the board.
Deliberately causing user's ignorance should be a software distributor's problem.
I don't have the time to test this, but if is true that you close the app and it sill continue recording that this is bad UX and the company should have prioritize fixing this instead of adding even more crap. Maybe some good practices would come from this.
It would be like on my phone the big red End Call button would not end the call, just minimize the app and put a small gray icon on the top-bar section.
Windows has also been hiding all system tray icons for over 2 decades at this point, unless the user specifically unhides that application.