I would largely agree but perhaps for a different reason.
“can this not include actions that aren’t directly traceable to a power relation between to people?”
while I ask:
“what actions exist that do not create an interaction between others, further to which what interaction can there be without power playing a part?”
So yes, I agree, that there is no distinction which is purposeful that can define an apolitical sphere, though perhaps coming from a slightly different direction on the matter. Likewise I don’t think a comprehensive ideology can fail to comprehend this aspect of the totality.
Further to this an anti-ideology which deems things to not be within this political sphere, would in itself be an ideology creating an understanding of a political sphere. It would be paradoxical. Maybe.