I'd go ahead and jump on the "Docking rings are ew." bandwagon.
I don't see them making any sort of sense, really.
While the other things like sound in space, incredibly fast engines, etc. can be waived off with 1. It'd be utterly stupid without it, and 2. Well who knows how advanced they could be, I can't explain this one with anything.
I'd really be for removing docking rings and making the thing with docking buoys. It wouldn't really be too much work, and would be much more immersive and realistic.
For example, take the cardamine convoys to Manhattan.
Instead of landing right on top of the main city, going through the LPI operated starport (Facepalm!), they could dock on a small hidden settlement on the planet surface where they'd sell the drugs to a fence.
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<span style="color:#000000">All morons hate it when you call them a moron.