There are other recurring issues, myths that he feels entitled to debunk. Like the fact the he is still blamed for opposing Pet Sounds. If that ain't true, and keeps being repeated, he has a right to clarify things even if it's a lost battle among some.
There's quite a bit of evidence to support Mike's not liking Pet Sounds, isn't there? Calling it Brian's "ego music" and the infamous "don't f*** with the formula" was concerning Pet Sounds, wasn't it? I suspect Mike resisted at first but eventually came around and was supportive of it, as when he went to Capital with Brian to present them with the album. Now he just conveniently forgets his initial misgivings about the project.