I don't doubt the quality , comfort nor the 'value for money' of your boots but, I don't recall the last tropical flood or snow storm building the contamination up anywhere near my ankles, be it in Sydney or anywhere else.
I could think of a few management types who would have a pilot's head if they saw a pair of hiking boots ( muddy or otherwise) hanging out from the trouser legs of a uniform.
I would not walk into any of my past corporate offices wearing hiking boots in or out of uniform.
Really, when was the last Tropical storm, where was the muddy tarmac ( a sealed surface) or snow fall that necessitated hiking boots to keep you dry?
Boots such as yours may be practical in some remote aviation operations and if it is your personal choice, good luck to you.
I applaud your individuality .
For the majority?