That is the key! Do you have to wear a uniform or do you choose too ?
When I fly my business jet clients they would be horrified if I turned up in jeans!
I would without doubt get a severe telling off and would be required to be properly attired on the next trip!
On a flight into Africa I know I would cause myself problems if I wandered around the airport in jeans
As a PPL turning up to fly a Cessna 150 dressed in a white shirt with Bars I don't have to do that so it would be a decision for some egotistical reason!
The guy flying the fighter jet was not himself on display to the public so it was his choice what to wear!
Ferrying a jet from the USA empty it's my choice what to wear and jeans tshirt is fine and comfortable ))
Pace