No matter the bow, without proper repeatable form (not necessarily the same thing)and right thinking, accuracy will be difficult to achieve and near impossible to maintain.
Conversely, give the best made bow in the world with perfectly tuned arrows to an archer that has a variable anchor, torques the grip, moves the draw hand in and out from the face (from shot to shot), and any number of other process flaws, and the bow "won't shoot where he looks".
I do think some bows are an aid to the archer like some have written above. Some grips help set the bow hand correctly for each shot or end. Other things such as mass weight, length, and design features I know nothing about, may moderate imperfections in the archer's process.
I believe a very competent archer can be accurate with any bow.