A lot of points are rather irrelevant when it comes to that test, yes. But its a decent test to verify just how terrible a lot of characters are.
When it comes to RPs in the higher parts of casual and in advanced, you rarely see anyone wanting their character to be a Mary Sue. Thus, when a character is blatantly so, using the test can help them understand that it actually is one.
When it comes to RPs in the higher parts of casual and in advanced, you rarely see anyone wanting their character to be a Mary Sue. Thus, when a character is blatantly so, using the test can help them understand that it actually is one.