Your point is well taken! I appreciate also that you're not making an absolute declaration that advice is untrustworthy. I spent a long time as a professional advice-giver too, but if you lashed yourself to the mast and ignored my advice that there was a CBC padding oracle in your session cookie implementation, you were plotting a course to the ocean floor. Running a business means being careful which advice you let in and which you don't.
My only nit here is: between this and your other comment on the thread, I don't think Patrick's advice here was unwelcome. I have a vague recollection of Colin being asked first. Also: if anyone was going to ask before publishing unsolicited advice about someone else's business, it would be Patrick. So the Bingo Card thing is a bit of a low blow. Also, easy to make fun of when you exclude the context that he lived off that Bingo thingy for years.