The next best thing to being the top of the dominance hierarchy is to being under the protection of it. White women vote for the interests of their men like no other demographic of women, who to varying degrees are much more likely to vote for their own interests. These women are also deeply attached to the "traditional" hierarchy, where they may be second class citizens but at least they aren't third or fourth class citizens.
"Social Darwinism is a zero-sum game. If someone wins, that means someone else has to lose. Trump's followers want to be sure they aren’t in the loser category. A 2017 analysis of exit poll data confirms this as relates to female voters who opted for Trump. “Researchers Cassess and Barnes concluded that White women with less education and money (and opportunities) wanted to keep the advantages they had compared to non-white women.”