Wearing patent leather shoes does not help my judgement one bit - you are absolutely correct. It does, however, make me look more professional when I walk onto the field. Just like having my pants dry-cleaned and keeping a good crease in them and making sure my hats are neat and clean. Appearance does not help me call balls and strikes and it never will. It also will not help me improve. However, when we are observed in WV, appearance is part of the criteria and I strive to look as professional as possible. I like the word professional more than flashy. Is that any different than the "flashy" manner people call a 3rd strike? I think you are off-base in judging someone flashy just because of the shoes they wear.
I also agree with Steve on the ease of care. In 60 seconds, my shoes look like new with just water and a soft cloth. As fas as the sweating goes, I've not noticed anything about my feet sweating anymore than before. Besides, my sweat don't stink!