Yes I know it's possible to remove a buff with a PS4 controller, but the method for that is more difficult to explain.
And even when there is no language issue :
- Some people don't even know about the very existence of the Echo and it takes time to explain them what it is.
- Some people don't even know what a "buff" is and where they are on their screen.
- Some people don't even use the chat and they don't answer at all when we're trying to speak with them...
I try to indicate this issue in my PFs for quite some time now, but people still don't understand (or don't read).