I have already answered this question. Please refer to post #348.
Your post on #348 translates to to me as reading, 'God wanted something for men to to that would being them closer, so God decided that a church hierarchy, otherwise unnecessary, was the best way to accomplish this'. Hence, my question on why the otherwise unnecessary callings were created at all, when surely there would have been better ways of accomplishing the same thing.
Of course, maybe you meant to say something like 'the church hierarchy is necessary, and only men can be in it because women get to be mommies'. If you can't see why that offers no good reason to separate out the Mormon church as less sexist than other churches, I'm not sure what else to say on that. It's pretty clearly an arbitrary restriction enforcing an unequal power structure over an issue that doesn't apply to, say, a childless woman of 50. Can childless women become bishops after menopause?
It's also possible you meant something else entirely, and you might even deign to tell me what that was. What did not happen is that I read your reply and treated it as being blank.