Whatever it is, it's not "all human interaction".

La wik

Politics (from Greek politikos "of, for, or relating to citizens") is the art or science of influencing people on a civic, or individual level, when there are more than 2 people involved.

I think the more than 2 people involved is key. If you and I are just talking, maybe we're just exchanging information. "What time is the bus coming?" "At 4". "Thanks". It's just misuse of language to call that political. And even if I want you to like me, so I try to influence your opinion of me, that still strikes me as non political. Politics most clearly comes in a 3+player game with alliances.