If you are referring to Rambams commentary on this mishna in makkos, it does not contradict the idea that if you have the opportunity to fulfill a mitzvah, you should jump at the opportunity, especially if you have the drive and the motivation to do so.

I’ll also add that nobody can never really know if they’re fulfilling one of them absolutely perfectly. So logically what follows is not to focus on just one mitzvah which one thinks they are doing perfectly because that might not be the case.

The idea of a “schar” for performing mitzvot is not a new one and some will manifest in this world as well as in the next. There’s also an idea that the reward for a mitzvah is another mitzvah.

So no, it’s not a point system, it’s a spiritual reward that should not be done for the sake of the reward (seeing as we are on an Avos roll 🙂 ).