I don't really care what others think about my opinions regarding my own life anymore, unless it's someone who has authority over me or whom I care about deeply, as I don't want to strain those relationship further.
Empathy comes from experience, and it is hard for the average person to relate to a suicidal person's POV if they have never experienced anything like it. Unless someone is open to hearing new opinions and perspectives, it is just not worth it to discuss these matters imo. No matter how much other people invalidate you, only you know how you feel and what you've experienced. They can't take your truth away from you.
It used to bother me a lot more, but with time, the lack of understanding from others disturbingly begins to feel normal and you get accustomed to it. I used to think I could change people's minds and get them to understand what I was feeling, but the shame and embarrassment I received in response was too great.
The only scary thing that I still worry about is having my freedom taken away if someone with any sort of authority figures out that I'm suicidal. A year or so ago I dealt with a pretty life changing incident where my partner's mother kicked me out of their family home because he told her I'm suicidal, and she wanted me sectioned and forcibly drugged with heavy sedatives until I learn, "not to open my mouth again."
When people have the potential to sling such threats, silence is the only thing that can follow. Being treated like a crazy, irrational person for experiencing suicidality inevitably teaches you who is compassionate and who isn't. I don't care what these people think anymore because I know their world is so different than mine and they will never understand.