Despite your disclaimer, your justification for trigger warnings implicitly requires people walking on eggshells around you.
I am not saying that you need to “pull on your big-boy pants” and tough up. We all have to build up a shell of psychic armor simply to maintain a somewhat even keel in everyday life, but when something bypasses your higher reasoning and goes straight to your gut, that’s different.
Those who know you likely also know of your plight. At least I hope they do.
But those who don’t know you also don’t know about the traumatic event that still causes problems. What if they are making what they consider to be an innocent conversation and you have a meltdown?
What about them? They are going to be traumatized; worse, they’re going to blame themselves, even though there was no way they could have known.
Don’t they deserve a trigger warning, too?
I am not being critical of you. You’re making an honest effort to resolve a problem that confronts you. No reasonably normal person would want to cause you discomfort: not only for your sake but to avoid an embarrassing faux pas on their part.
But your solution appears to create more problems than it solves.