The purpose of stoicism(mindfulness) is to allow you distance from your impulses so that you may train them rather than be goverened by the chaos of them.
The difference between buddhism and stoicism is action. Stoicism/dominance vs Buddhism/Submission.
Which people will argue with me, but the evidence is the evidence.
People need mindfulness to limit calculability (difficulty in in formation processing).
We can construct it by bad means (islamic submission), ok means (buddhist meditation), adequate means (homogenous kin groups and rituals), or exceptional means (stoic self authoring and incremental successes in competition in the real world).