That girl is wrong... it is exactly because On can control how her "selfishness" appears to others that she is a good leader.
A leader's job is to better guide their team to a good outcome, it cant always appease everyone, sure they shouldn't just do what they want and not see the satisfaction of the whole but a balance is needed so that things go well.
Doesn't mean those girls can't be dissatisfied by this, but it is what it is.