They did film on Tatooine. They couldn't film on Endor so they had to go to Romania. That's why everybody looks like that.

Yeah there is, it's in the growth patterns where you can tell the trees were either planted or allowed to grow in an arrangment that maximised yield, are all very similar in age, and historically but not recently regularly trimmed for wood and sticks without chopping them down.

Asia and Africa (other than Japan, which did it with evergreen trees) historically used other materials (mainly grasses/palms), and in the Americas they used different construction methods both pre- and post-colonisation, so you don't get (as many) old managed woodlands.

Interesting video on the topic

wait what does this mean