The real question is why would he be impressed with Eisley when he’s undoubtedly seen Mos Espa:
Beggar’s Canyon the favorite haunt of young Luke and his friends in their T-16s, was for some reason, placed right next to Mos Espa. Which is on the other side of the map far from the Lars homestead and Mos Eisley. Undoubtedly they would have to fly past Espa whenever they wanted to race the canyon. And probably frequented it to refuel and celebrate after their races.
