Why do you think I have an obsession with freedom? I'm not the one throwing out "ultimate". I said specifically I might be willing to give something up for a relationship. That doesn't sound like an obsession with freedom. It is those of faith that insist on all or nothing. It's all freedom (can't have relationship) or nothing (slavery!).
Of course, I am a product of my culture. We all are. I think morality is subjective. I think the reason I think slavery is bad is because of the history that made me me. Would I think slavery was bad if I were a either a plebeian or a senator in ancient Rome. Probably not. As a plebe, I might not like it, but I probably wouldn't think it immoral.
As a modern human, I'm part of a culture that has analyzed the effects of slavery both on the slave and slave owner. This culture finds slavery abhorrent. I'd like to think that were I alive 200 years ago I'd find slavery abhorrent. Chances are, I'd be ok with it.
Morality is inherently flexible. Different times and places give rise to different moralities. Here and now, I find slavery abhorrent. I can't imagine, given what we know now, a situation that would make slavery acceptable. While I can imagine that there are times and places where people did find it so, I cannot imagine regressing to that thinking. I am a product of my time. I find slavery abhorrent and immoral.
Interestingly, while I recognize my morality as subjective, you do not recognize yours as being subjective.