The majority of people in MI voted to amend their constitution to disallow the ridiculous oxymoronic "gay marriage", 59 - 41 percent.
Clearly the marjority there didn't care less -- they cared more.
The same in every state that enacted a voter approved ban on "gay marriage": the majority of the people cared more.
Where the states blew it, somewhat so to speak, was in not realizing that political ideology in power would one day, as sadly usual, trump majority rule, and these states would have done well to also enact at that time a civil union domestic partnership law similar to the civil union domestic partnership law called "marriage", only calling it "homarriage" or the like specifically for same-sex couples, same-sex couples who are, obviously, unqualified for the "marriage" statute civil union domestic partnership as they are not "a man and a woman as husband and wife" that marriage is.
Money isn't everything.
Humanity has historically spent much money righting wrongs.
Fighting against the tyranny of the minority, the minority of those who would want "gay marriage" for themselves and their temporarily-in-power ideological power abusers supporting the disaffected coalition, is simply one of the ways humanity spends money to fight wrong doers and right wrongs.