My take involves where I believe Lucas' mind was at the time SW was written, assuming he had in his existing backstory a timeline similar the official one of today, that these last warriors, relics of a forgotten era, were a somewhat allegorical reference to the mid-to-late '70's mindset of negative opinions towards soldiers (veterans, specifically).
Lucas has played with the anti SE Asia conflict and big-government themes as far back as THX1138. American Graffiti plays like a goodbye to the period lost to it, and then that dead horse is continually kicked in More American Graffiti. It’s apparent all the way through Star Wars into Jedi, where he has specifically called the Ewok victory over the industrialized Empire a direct reference to Vietnam. (And not a very pro-American view, obviously).
It may be nothing, but looking back at the cantina, in a world where the Jedi have been portrayed as outdated and villainous (using the assumed Ep3 direction), most onlookers probably wouldn’t look on in shock or disbelief, but with indifference and maybe contempt, similar to the attitudes many took towards veterans in the period Lucas was writing his drafts.
Just a thought.