Have we ever come up with any other viable "little help" that is useful that is other than opening the drapes?
There are probably a thousand things. The shooters have to access the property, conceal themselves there, find Michael's quarters, do the shooting, flee, then someone has to kill them, and they have to flee. Any of those functions might require "a little help." Note that Michael doesn't spend the movie searching for the drape opener. The drapes are never mentioned again.
