Everyone avoids people at some point in their life. That's normal. What's not normal is avoiding all people all the time.

If it's a PD, unfortunately it won't matter if you know what started it. Well, you know what started it, it was emotional abuse as a child. Big deal, I can list all the awful things that were done to me, shock the hell out of everyone. It's there and it's not going away.

If you're not avoidant, if you don't have that PD, but just have avoidant behavior due to certain triggers, I think what you're saying might make sense. You find out what your trigger is, you work on not being triggered by it, you don't have to avoid that situation any more. By the way, what you're describing is what's done in DBT.

But what you're talking about is not avoidant personality disorder. I can speculate that it's a good idea, but I don't know if it would work or not. It wouldn't work for me, that's all I can say about it.

I'd suggest - and I've said this before - that you look at how you articulate your theories. You say things (one that pops right into my head is when you said people perceive avoidants as having poor hygiene, or when you suggested all borderline people are violent because of the one personal experience you had) based on what happened in your life, and assume everyone has had the same experience, posting about it like it's common for everyone. When it's not - like you're idea about just finding out what started your avoidance is they key - it comes off as offensive. When you're a teacher you have to seem like you know everything, so that's probably your habit. But I would watch how you state things - are you saying something about yourself, but making it sound like it's universal - so you don't ruffle feathers.