I think that is the right answer. It is only when you experience the effects of a strong crosswind with not enough aileron that you weigh up properly the strong roll element on lift off, at minimal speed, against the unnoticably marginal drag element through having your spoilers cracked open on one side. It's not a time for take-off performance theory- the only priority is to keep wings level and get the aeroplane settling down as it yaws into wind and commences climb. With about a 10 degree margin before something strikes the ground at that moment, you can't afford an inadvertent roll just so that you can save a very small bit of drag from cracked open spoilers!