Originally Posted by
Capn Bloggs
Professional PILOTS Rumour Network!
Being in my uniform sets me up to be in a professional mood. Seriously?
Never underestimate the influence of human factors.
Turn the argument around. Why would pilots prefer casual dress in the sim? More relaxed? More comfortable? That is already a tacit admission that one's attitude is subtly modified and thereby the realism is reduced.
Whether that matters regarding what the sim is intended to achieve is an open question, but it is generally a mistake to assume oneself immune from such influences.