The limitation argument applies to the meaning of the word political rather than the application of the concept. While one can look at the political angle of anything, describing everything as political means the label "political" ceases to have any meaning whatsoever.

If everything is political then what's not political? Definitionally nothing. So saying "X is political" becomes equivalent to "X is".

This is a specific case of a broader truth, which is that expanding the definition of a category lowers the information entropy of that category.