TBF, that addition emphasizes how crowded Mos Eisley is.
And yet, Lucas talks on the TPM commentary about how Mos Eisley is a small town compared to Mos Espa. Unless he was getting it confused with Anchorhead.
There were plenty of extras walking around in the original footage. You don’t need a lumbering beast blocking a shot that was never intended to have such a thing in the first place.