Trouble with that underlined bit is that the background features are written in a way that very clearly leads new/inexperienced/unreasonable players to be 100% certain of their push button success ability.OK. I agree that the rules don't say anywhere that this kind of fictional positioning (aka 'roleplaying') is required for background features to work. But I don't think the rules require this stuff for skill use or attack rolls either. So either we are all playing very flat mechanical games where players just say 'I attack the orc', 'I diplomacy the guard', and 'I noble background trait the Duke', or we are accepting there is a need to add more detail and description to those actions beyond what is strictly required by the game text.
5e is rife with these kinds of things* but background features take the cake by doing it to such an extreme degree...
*Lots of races with a climb speed had similar when they were seen in the past, but instead of a climb speed it was often a +N to climb checks that allowed for situational nuance rather than overriding the GM & frustration if the GM goes vader by saying "I'm altering the ability here"