During the escape from Bespin the only things herding The Falcon to The Executor's tractor beam are a few fighters.
Normally Lando and Chewie would turn the ship around and shoot them out of the way but they are busy prepping the ship for the jump to Hyperspace.
They still have 360 degrees of space to dodge them in.
But if you add a couple of ships blocking their options to maneuver they would have little option but to push forward into Vader's trap