Am I selfish because I don’t want to date single dads?

Mom says I’m selfish, picky, and have no grace, because I don’t want to date single dads. Background info, my dad is not my bio dad, he and my mom married when I was four and he adopted me soon after. I never knew my bio dad so as far as I’m concerned my current dad is my dad for all intents and purposes. So because of this mom thinks I’m wrong for not wanting to be a step mom right out the gate. Am I wrong?