Quick (and tired) answer.
I am not sure that we all are part of the patriarchy - we may live in a patriarchal system but that what I understand the question to mean, really. You can uphold, negotiate or resist the system you live in. (plus, I don't believe in 'the' patriarchy, I think patriarchy is fluid and changes over time).
So, the question is surely who do we know who upholds/perpetuates what we see to be patriarchal values. And whether benefitting from something is the same as upholding it. Benefitting from patriarchy means being able to access opportunity, being listened to, having value in society as a man etc. Upholding patriarchy means contributing to any practice which perpetuates the oppression of women.
On a practical level, looking at men around me (mainly, but not only, educated middle class) many of them both benefit from and uphold patriarchal values, explicitly or more implicitly. None of them are horrible people, but you notice the patriarchal mindset in more subtle ways. I can think of one, possibly two, counter example(s) at the moment.
Hopefully that does not completely miss the point. Going back up thread (I think it was this one), I tend to agree with Mini, I think it was, that racism and sexism do stem from the same root, which is namely the desire for power and economic wealth among a certain group within society (white, middle class men) who have historically sought to dominate other groups.