I don't think you've sounded harsh. You obviously disagree with me but I think you've done so politely.

I guess my feeling is that different people learn differently and I'm not as convinced as you seem to be that this is the wrong way for all people to learn (as opposed to the wrong way for some people to learn). I grant that I could be wrong on this but I feel that I, at the very least, would gain something from this sort of tutorial. Open to be proven wrong if there's a chorus of dissenters.

Obviously, I could write a better explanation of decision theory if I had researched the area for years and had a better grasp of it. However, that's not the case, so I'm left to decide what should do given the experience I do have.

I am writing this hoping that doing so will benefit some people.

And doing so doesn't stop me writing a better tutorial when I do understand the topic better. I can still do that when that time occurs and yet create something that hopefully has positive value for now.