I think the biggest reason folks are so paranoid is because brisket is unforgiving and expensive. If you overcook a rib roast, who cares, it's still flavorful and tender (to a point).
Before I bought my WSM I drooled over the lousy select cuts at Wally World. 17 lbs. @ 57 dollars.
Now that I have my WSM, I can't find one locally to save my life.
I will say that I agree with you in terms of all of the posts asking how to cook a brisket. When I do finally score one, I have all the confidence in the world that I'll nail it because I have done my homework here.
At this point, I'm certain I can do one in my sleep.
All of the info you need is here folks.