Just look at the statistics: https://www.ssa.gov/policy/docs/population-profiles/marital-...
In broad strokes: married people tend to be way wealthier than never married people, and divorced women do much worse than divorced men do. (Women are much poorer across the board also, of course). If your claim was true then the poverty gap between divorced men and divorced women would be much smaller, and we see that's not the case. If alimony/child support is such a raw deal for men it should be visible in the statistics.
Note the poverty rate for men who never got married vs men who got divorced. Marriage is not the raw deal for men you think it is.
And still, in USA, women do file for divorce more, because simply that financial control is not enough to keep someone in. Funny enough, it tends to be be organizations dominated by men who push against no fault divorces and toward even bigger financial dependence of their female partners.
Even if it goes to plan with her getting alimony and partial retirement, she's still dependent on her ex-husband which is a frustrating and often vulnerable position. It means he is still in her life. He can harass and badger her about how she spends money. He may pay, but he might often be late, or sporadic, which causes her bills to be overdue and have late fees. Maybe he starts hiding money, he could even tank his income for a year or two to have the courts change the agreement. None of this stuff is transparent and can be very adversarial.
You are a victim of a common cognitive bias: https://en.m.wikipedia.org/wiki/Women-are-wonderful_effect
Great deal for women. Horrible deal for men.