As long as most ME carriers adopt the reactive action as opposed to the proactive way, letters like the one from TC sound hollow, to remain politically correct.
I know of a captain exercising his authority and demanded a reroute to fly around a taifun just to be called in for tea and biscuits and being told by the CP that next time he does that, the latter will burry him alive in the desert.
By the way: Dispatch asked "Why? You fly over a taifun, don't you?"!!!!
This to illustrate the threat mitigation attitude or skill of the people in charge.