Why would someone want to be trans given the choice?

Genuine question from ftm here.

I have a friend (also ftm) who says he wouldn't want to be a cis guy given the chance. His reasons are that he doesn't like amab genitalia and that he likes being trans.

I am not asking to invalidate his identity I am just hoping someone who also feels this way could explain because I would like to understand.

From my perspective the only reason I am trans is that I have no choice, but ideally I want to be a cis man, so being trans is the only realistic way. However if it was possible to make myself have been born amab I would take that 100% because it would make my life easier and I wouldn't need to transition.

So basically just wondering why a binary trans person wouldn't want to be cis given the choice.