Rainboe. I agree with you! But, if I had said it, it would have gone like this....
I have never seen ice
FORM below -40C in over 20,000 hours flying.
Below -40C, I've only ever flown in Clear skys, or Ice!
Ice can form below -40°c in particular conditions wether you like it or not
Sorry, I don't agree.
Then, along comes someone (Boeing) and says that we can take that ice (or water vapour) and heat it up; thus melting it within the engine(Simple summary). Okay, turn the Anti-ice on.
Is it that complicated?
Bottom line. Employer pays me $XXXXX per month to fly their airplane, their way. If they want engine anti-ice on below -40c, and they publish that requirment in an approved document (FCOM, SOP, etc), I'll do it. Just keep the paycheck coming.