True.FCTM says such things. Would be the first aircraft in my life that ACTUALLY asks me to do that but I prefer to full decrab it as in most other types(and I have landed easy up to the max demonstrated wind conditions)In some companies you "have to play the game" in the sim and land it as they say. But why not decrab it if there is really no penalty on handling(more an improvement I would say by "decrabbing" it). What the FCTM suggests is one thing that you do not want in an already stressing situation - feeling VERY uncomfortable.
Once properly learned(as most of us know), decrabbing an aircraft is an easy thing.
My advice: Play the "game" as long as you are under training(depending on the linetrainer really, most use common sense and decrab it OF COURSE). Later, if you sit on the left seat there is no issue how you do it as long as it is safe. If you are sitting right discuss the plan during briefing with the skipper - most will be happy.