For 90+ percent of us, gender is not fuzzy and the boundaries are much clearer than your article proclaims.

A mechitza would be effective for the majority of us who identify clearly with our gender...the most recent sex survey points out that homosexual behavior is limited to one percent of the population.

Kinsey [whom you credit as seeing sexuality as "fluid"] incorrectly posited homosexuals as making up 10 percent of the population. His data did not stand the test of time; his methodology [using pornographic magazines to gather subjects] was severely compromised.

The mechitza come out of a tradition which separates sexuality from public worship. While I don't pray in a synagogue with a mechitza, the notion is still a sound one.