It really depends on the discussion for me. I'd rather only interact with discussions of suicide when I'm in a proper headspace, right?
I'm almost always uncomfortable with someone discussing why they are deciding or have decided to CTB because it can make me feel really hopeless on an otherwise okay day. Discussions of suicide as a concept or as a personal right is fine. There's also the whole thing where, like, sometimes commiserating can be helpful, but a lot of the time it just brings you down, so I try to avoid that.
And then there's that whole thing they do in schools sometimes where they're trying to teach you the signs of someone being suicidal — noooo. No thank you. I don't like those conversations. They feel like a way to make non-suicidal folks feel like they're helping somehow. (I appreciate the attempt to educate, but it feels aimed at non-suicidal folks and it feels poorly done.)