Sorry but i 've pointed out a little mistake in the definition of the idiom YES MAN.
...people who always AGREES with authority and not who always AGRESS...
In this last case,he should be a quarrelsome man..???
Regards from Belgium
You are quite right!
Nevertheless,"..agress.."as written in the text,led me to the french verb (agresser) wich as you know, means to attack and thus my first but inaccurate instinctive conclusion was to connect ..agress..to a quarrelsome one.
"Too much ado for nothing" is surely what you think about all this...