Two words here that need to be focused on:
Setting - This includes the style of game that you are playing. Meaning that part of your setting is realizing that you are playing a character in he World of Darkness (usually) and that the Storytelling System governs that world. You can choose to ignore that if you like, but the people that play within it will ultimately be more advantaged. It's just that simple. Example: I can sit around RP chatting with my friends on World of Warcraft, and never do raids, because I don' think I have the skillset to keep up with something like that. But I will also fall behind in terms of skills, equipment, etc, and it will be much harder for me to keep up. Doesn't mean I'm doing it -wrong-, but I don't get to bitch about raids dropping better stuff either.
'Wants To' - Bingo. This is your choice. It's not something that's forced on you. You aren't forced to get less xp because you aren't allowed to run stories. You choose to. So while this might be a valid playstyle for you, it's not enough of a justification to penalize the people who can run stories and take on that extra responsibility.