I even mentioned that I have the The luxury of being able to sacrifice my relationship with my family to stand up for what I find to be morally correct. I'm also fortunate enough that I don't have to sacrifice my family relationships to stand on the side of morality. The idea I'm trying to get at is that at some point what's right is more important than what's convenient. And I'd then argue, only children are afraid of being punished for doing what's right.
Ditto for my ex-SO who we've disagreed with about a few things. If you talk to someone with respect, and compassion with the goal of understanding over proving you're right. It's very easy to disagree harmoniously. But again, that's a matter of respect and tact. Not about separating who you appear to be from what you actually believe.
I'm hard pressed to think of a more toxic relationship with someone you'd call your significant other than one where you have to pretend to be or pretend believe something fake just to avoid something that may be uncomfortable. If you're speaking from experience; I don't envy you. That sounds like a horrible way to live your life. Avoiding conversations because of fear of conversations that require tact. If that really is you, you have a lot of learning about how to have conversations to make up for.
Why would a name I chose for myself be worth any less than a name someone else picked?
Yes.
I'm going to pretend you made the comment I'm assuming you meant to. No that's not ok with me. I'm strongly opposed to taking something someone said out of context and using it as ammo for a different conversation. I'm also strongly opposed to doing anything other than assuming good faith when trying to interpret previous comments. I don't believe the solution to people who act in opposition to those ideal is hiding.
> Why would a name I chose for myself be worth any less than a name someone else picked?
It wouldn't, but that's not the connotation of the OP. The intent was to use a name to hide your real identity. You can choose your real identity, but that's different from hiding behind a pseudonym.