On the contrary. The reasoning that you present Biden as going through is exactly like considering one's position and coming to the conclusion that freedom of self-identity and conscience and/or the immorality of forcing someone to live in a sexual identity against their will are more important than one's own moral and/or visceral (i.e. vomiting) objections to transsexuals when it comes to public policy.

The only reason it would not be is if you don't believe that people who claim to be repulsed by abortion are really as repulsed as they claim.