Yeah that's a common justification it seems. Elite: dangerous also has the same one. When your canopy gets blown off it actually stops the sounds too (and there's a giant hole in your HUD because it's also responsible for that)

Well, that would be a god-level acoustic set.

There was a fan explanation (which I maybe saw somewhere in novels), that they sort of listen to some band in the clear like analog radio (in situations where binary-encoded communication is not available), and that working engines and shooting blasters make lots of interference there. Filtered enough to save the pilot's hearing and sanity.

I mean, that's similar to what you said, just better IMHO, cause sounds are not "generated", but derived from signals around.

You don't even need the ship to have active acoustics, just that the other ships whizzing by using "insert sci-fi techno babble force here" affect space and matter around them in such a way that energy waves from that sci-fi force moving silently through the vacuum and turn into sound when they interact with the technology/structure of your own ship or spacesuit. Like a microwave generating sparks and a crackling noise across metal foil.