This is extremely outdated thinking and something many people actively take offense over. Genitals mean nothing when it comes to identity.Consider your life and your day to day interactions, how much does your genitals factor in to things? In your job or with your friends? Presumably not much aside from sex, in which case it’s no one’s business but you and whoever else is involved with that. Genitals are not gender.

To speak nothing of the finical or legal hurdles one has to go through, but bottom surgery is not something every trans person does. No trans person is “more serious about it” or any more/less valid than any other person, regardless of their medical history.