But it is also possible to interpret your claim as saying that non-standard genders are less valid than standard ones

Well they are, although "less valid" is a rather strong understatement.

'woman are not worthy to vote'

You do realize that that's a moral claim. In order to evaluate it in a utilitarian framework, one could look at, for example, whether women having the vote leads to better or worse policy outcomes. I think this is certainly a debatable position either way and certainly is far from obvious. Heck it might even depend on other properties of the society.

I'm fairly certain that what you actually want to claim is something much less strong

In other words, my position is outside the range of positions you're used to encountering, and you're desperately hoping I back-peddle so you don't have to think of arguments against it, in the process have to question the axioms of your philosophy.