There is no should. It’s your tv use the settings as you prefer.

The recommendation comes from an idea that you will more likely get content the way it is supposed to be presented with problem apps this way, and to avoid the display mode switching with ads

Sounds like that teacher should be asking it to fix the projector rather than bugging you

You have a subscription. You are neither a new nor a returning subscriber to wither service.

To a certain extent, yes, but apps like Infuse remind me of the potential that lies in moving away from the Apple mold.