Do you always need the på after stoler (for people)?
Yes, it has no other uses (it just happens to share spelling with chair, stol, sharing it's main property of "support"). And you can very well (not) trust animals and inanimate objects too.
What about "we have no trust in him"?
Vi har ingen tillit til ham
Can we stop discussing politics?
We don't count on him?
I'm pretty sure that's Vi regner ikke med ham.
lots of leftist sheeptards on duolingo, kek
The "på" seems rather unnecessary.