These people think their skills are so great that they inhibit betterment of the system. It's one example why I state that the greatest impediment to advancing an audio system is the audiophile.
System performance is independent of listening skills. To suggest that all audiophiles need to be in competition, to navigate the hobby like a racer is self-serving and irrelevant to the bulk of hobbyists.
The post is ironic coming from someone who has spent inordinate time talking about tweaks. Tweakers, who use poor system building methods, need to think their listening skills are extreme. :)