I think the point being made is that posters of any of these people don't have a place hanging on the wall where children are training. If adults are training and all they care about is "winning" cool but, imo at least, if you are teaching children you don't only have an obligation to teach them martial arts but to set good examples.
I do and I teach children. I wouldn't dream of telling anyone that Tyson is a role model to look up to.