Don't forget, "flying" is
so expensive as to not be realistic. I mean, only a moisture farmer on a super wealthy planet like Tatooine could afford something as rare, expensive, and uber sophisticated, as a repulsorlift landspeeder.
Only a truly wealthy slave podracer, or successful crime lords ike Jabbam could afford repulsorlift vehicles.
[Note that this ^^^ barge is sufficiently sized to transport Rhydonium]
[or to be the "train" engine to pull many smaller "cars"]
And technologically advanced races like the Verpine
used them to move huge asteroids around.
There's just no way the Empire could afford it!
Besides, they probably weren't even aware of the technology! I mean, it's not like they used repulsorcraft at other bases.... oh wait.... the Moff Gideon led Imperial base on Nevarro had some, like the Trexler Marauder that Carl and Gina used to escape just a few episodes ago....
And even IF they could afford them, they require years of training to even operate!
But yeah, nothing to see here! No plot holes and certainly it's
NOT OK for anyone to question
ANYTHING!
[I'll just add my opinion that Gina is an absolute SHIT actress. Like slightly above middle schooler level - think mediocre high school level - "actress".]