[prisonality]

As with everything - context is required.

Mindfulness is only one aspect that is part of a system that is the 'eightfold noble path' which have to be taken wholesome:

right view, right motivation, right speech, right action, right livelihood, right endeavour, right mindfulness, right collectedness / stillness

They're of equal importance, if not higher: particularly #1, #2 and in the context of the discussion: #4: right action.