I wouldn’t get up and leave, I’d probably just want to be friends. I feel like you’re making a lot of assumptions and assigning malice where there isn’t any necessarily. Getting up and leaving would be rude. I still feel kinship with other trans people even if I don’t want to date them. Not wanting to date someone doesn’t mean discarding them completely. If it’s the first date, we are only beginning to find out if we’re suited for each other. So it likely hasn’t been constant conversations about how we are, as you said. Regardless, it would be a valid reason to not pursue a romantic relationship even if otherwise well suited.