but if you cause a 'delay' to 'doors closed'/push back you may be asked (by a 'suit') why you did not 'allow' the system to work.
I have myself been on the receiving end of exactly that kind of phone call as a result of a U/T captain going back outside to confirm that de icing had been completed correctly, but the dispatcher noting the entire delay as "crew".
Safety seems to be way down the list of priorities nowadays.