Well my main point is that it would only make sense that the specific volume, frequency, intensity, and any number of factors should contribute to how your back shoud take it and for how long. I certainly wasn't suggesting you should push it. Qutie the opposite. Something that allowed you to progress longer would mean you were pushing it less since that would entail more recovery for you back and less of whatever accumulated factors are leading to pain. Sorry I wasn't aware that you had tried every way of training known to man and that they all result in a six week limit.
I'm not even saying a six week limit and then a deload is such a terrible thing. I was only trying to offer friendly advice and it is fine with me if you think I am totally wrong. If you won't to close your mind to possibilities who am I to question? It's all meant in a friendly way and is nothing to get defensive about.
As I said, welcome and good luck