Luke would probably never have thought about leaving if a single port was so busy. There’s probably a thriving metropolis nearby if all that traffic came and went. Even the little CGI creatures ruin the idea that it’s a barren wasteland.
I was about to make a comment along those lines. Expanding Mos Eisley definitely contradicts the notion Luke’s sets about Tatooine with his earlier remarks. A buzzing spaceport with scurrying creatures, various alien life, and speeders galore definitely doesn’t fit the idea of Tatooine being the planet the farthest from the “bright center of the universe”.