I don’t get it. SW is full of “anachronistic” dialogue. Especially anything Han has to say when he calls Leia “sister” in a very 70s way and references things like crop dusting.
Tatooine has farms, and Luke is clearly a farm boy. Crops must get dusted somewhere, even if it’s not on Tatooine. It’s no more anachronistic than Owen’s referring to a harvest. And that use of sister goes back to the 1930’s in movies at least.