We had a WO Bronco driver in the mess at Lossie. He couldn't understand why everyone kept staring at a WO in an Officer's Mess.
As for 'any WO in any military' I think you might make a distinction with the senior service and one WO Rocket in particular.
When it came to bidding for an exchange slot at Waddo the RN accepted the hit and offered a WO in exchange for a Sgt. Good rate of exchange.