I have argued in the past that 'abandoning the hindrances' IS the practice. Satipatthana is approached by abandoning the hindrances and culminates in jhana. If I have a good day (an extremely good day!) I might begin a sit without to much trouble from the hindrances, but even then the process is still to keep abandoning the hindrances. 'Sitting' is the main approach with which we can abandon these hindrances - insisting we shouldn't meditate before they are abandoned seems non-sense - abandoning them (letting go) is what meditating is all about.
Ignorance is an intentional act.