That's not how this specific discussion panned out though, and obviously now you're referring to other instances.
You might find it annoying, but whether someone brings their 'CV' into it or not has no bearing on the strength of their point or criticism. I've never played or coached football at any decent level, so I actually don't mind hearing insight related to it from some of the people on here who have.
It sounds like you're just trying to have a dig at an individual, which is fine, just say that.