Certainly sounds like an attack. As if someone can't wear cargo pants simply for their utility or, god forbid, find them actually aesthetically appealing.
A widespread low-but-definitely-nonzero would be that you can absolutely wear what you like, but half of the informal roles that are within the scope of your job description are effectively closed unless you dress the part.
The blog author comes across as fetishizing that shallow, expensive, your-opinion-dictated-by-fashion, world.