not everyone who raids wants to heroic raid. some people are happy with flex or normal or whatever. this is not 0.2% of ALL THE PEOPLE THAT WANT TO KILL IT, this is 0.2% of all the people who at the very least zoned in and killed a boss. their in-game goals are not specified.
go count the number of people who are currently 1/14H to 14/14H and you've got a closer figure, but even then not everyone will have heroic garrosh as their goal.