My objections on the topic are fairly simple:
* We shouldn't create laws around activities or identities that cannot be objectively measured.
* Peoples personally held identities shouldn't be foisted up such that everyone must accept them unquestionably.
People should be free to love, fuck, marry whomever they want and express themselves in whatever degree of masculinity or femininity they are comfortable with. If we had widely known gender-neutral pronouns, I would use them.