Let’s say that you get to make a choice under two circumstances:
1) Under this set of circumstances, you can choose to marry someone and it will be very difficult to get unmarried to that person. Only certain actions will allow the marriage to dissolve and, once dissolved the marriage is actually over – i.e. there is no remaining legal relationship between formerly-married parties. If the marriage ends, you’re on your own.
2) Under this set of circumstances, you can choose to marry someone and choose to divorce someone at will. Once the marriage dissolves, you can force your former spouse to support you.
My assertion is that a person making a choice under 2) is significantly less free than a person making a choice under 1).
Circumstances 2) essentially treat the decider (i.e. the woman) as not responsible for her actions. If you don’t suffer the consequences of your actions, they’re not free actions.
Progress in marriage then, inspired by feminism, has ended up reducing the freedom of women.
Of course, I’ve written before that modern "freedom" means old-fashioned freedom of a child. Children are free to act and avoid the consequences of their actions. That’s modern freedom.
(This post inspired these thoughts)