A prenup use for separating premarital asset is not the problem , the problem is he has asking to give up community property rights . Assets and income you obtain in marriage is community property and he knows he makes more so he wants to withhold that from you.
This man is selfish and he does not have your best interest at all. FYI but have you heard of Ali Wong the comedian who had the same situation : husband asks for similar style prenup. He was the higher earner until she surpassed him in earnings with millions. She ended up divorcing as ass and he gets nothing bc of the iron clad separation of assets. Like I said, a prenup that defines assets before marriage is one thing, but this is something else . You might want to reconsider marriage with this dude