The argument for devaluation was based on supply and demand. I thoroughly proved that this supply and demand (numerical) imbalance exists between men and women.

If you don't think that giving someone an overabundance of options means that some of those options will be devalued--especially when compared with how they value the options they have if they're only given a scarcity of options--I don't know what to tell you.

That's an obvious and unavoidable mechanism for devaluation, and it's not any further reducible beyond that.