I do see value in the core of your argument but, boy, do you ever not know how to sell it.
In essence, your main argument is: "Here is how I see it". Well guess what, that's the same argument that the guy you're replying to made, so it might help to be a little more humble about it.
Arguing with others is only a tiny bit representing your own viewpoint. It's mainly about then figuring out where the person you're talking to stands on this and finally negotiating a path for the other person between the two points.
Your main point seems to be portraying the hurt that you've experienced and how you dealt with it when your mother had her "episode" (does she still have it? It was never resolved to us) while reminding us (rightfully, I think) that having a core priority is all fine and well, but (especially at times of distress) it might not get you through the endless sea of small challenges. A fair point that is not particularly nuanced, but that always makes for a good discussion. What came out of your mouth (fig.) was basically "you're an idiot, I see this differently. Also, while I'm at it, let me curse some more". (Not that I particularly mind expletives, but in your comment, I was tired of them the third time around already.)
Not very persuasive.