I think you can kind of see the answer from some replies on this thread. Some people get their knickers in a twist if someone else, even in basic MSQ content, is not playing the way they think and want them to. Since they go in with expectations toward other people, they get upset by the data provided by the parser. Those who are using it for self improvement don't get upset, because they are going in with a mindset of using the data to enrich themselves in some manner.

For people who get depressed by the numbers X or Y class does, they sound like they aren't playing the class for the right reasons. If you love the class, don't let someone else's opinion or expectations make you hate it.