I think you're missing the point. Nobody would argue that CentOS doesn't make sense - the argument is that it doesn't make sense if RHEL owns it, as there is a clear conflict of interest.
I think you might be replying to the wrong comment, as this doesn't really relate to my point at all.
I don't disagree with the sentiment that RHEL also controlling the free alternative doesn't make sense. I do disagree with repeated assertions that people can just use RHEL for free - for the most part, they can't.
Ie. CentOS takes those users who won't pay, RH takes those who will, RH controls both and there's no niche for anyone else.
Evidently I was wrong.