like @turnip_farmer I too don't think trademarks work like you seem to thinkNo. This is wrong. Halflings have weapons. Halfling archers are in Tolkien. Ergo WotC cannot mention them. However, if you look at halflings where they appear in adventures, they are armed.
It's also wrong to assume that the places halflings live are as dangerous as Tatooine. I've already mentioned that in Cormyr you need a licence to carry a weapon. I.e. no one has them unless they are a knight or licenced adventurer. This means Cormyr is SAFE. There are no tuskan raiders in Cormyr.
Pretty sure I don't need to find evidence of dwarves with a shield sword spear hat armor or sandals
DRA351. "Several small animals come and go at the oasis... One of the regularly seen animals - an herbivorous raslinn [sic] - is actually a halfling druid named Derlan."