to rest or not to rest

[lightoutandarmed]

...'just want the opinion of the experts.
i was always told to use the arm rests in my last two jobs. some of the old timers even called it a good habit. the rational being that you don't tire your arms and fly using your wrists. now i'm being told by my new airline (or by some of the ip's) that it a bad habit. and that it'll affect controlablity especially when landing with high cross winds.

comments please.

thanks