It depends on what you mean. If someone wants to be legally accepted as a woman, or treated like a woman for most intents and purposes, that's fine with me. But I sincerely doubt anyone would want you to accept that a former man is exactly the same as a woman in every way. That would be tantamount to asking you to change your own desires/attractions to accept them, which no one can realistically do. Anyway, I don't think I've ever heard a trans person advocate that scenario. Trans people don't stop identifying as trans after they feel they have transitioned to the opposite category, so it's not like you'd have all these former men/women running around with mysterious pasts and shyt.
The comparison wasn't between those specific things and transgenderism, but rather between not knowing about those things and not knowing about your spouse formerly being a man... the point is, if you don't know your spouse's own past, you share some of the blame. If you want something that is not a behavioral problem, then say your spouse has HIV, for example. The lesson is the same.
This was the point of the thread. They are now wanting to be accepted as real women. They want to compete in women's pagents, sports, they want to use womens restrooms, they want to be counted legally women. On marriage Liscenses they want it to say woman. So yes if all this is accepted you wont know what type of woman you got. shyts not cool