Oh ... so the
Vampire Fleets and
Virus are the "good guys" then ...?
I'm confuzzled.
See Infojunky's query...
Are there really any Good Guys?
No, not really.
The Imperium is softened from the definitely flat out evil dictatorship implied in early canonical CT adventures in later CT adventures, but there's not really any point where it is "good."
Indifferent? Oh, Hell yes!
Spewing propaganda sufficient to enlist Bill the Galactic Hero¹, all of Mantis Squad², and Miles Vorkosigan³... and probably also Colonel John Christian Falkenberg⁴, and others.
They don't need to be the good guys, they just need to ensure that you think the other empires are worse.... I felt that pretty clear in the CT version of TTA.
I suspect Warhammer 40k started life as GW's intended rules for a Traveller Minis Game... which was cancelled when GDW cancelled most licenses.
MegaTraveller again shows us a truly horrible, several "At least He's not Lucan", one "would be decent if you and axe Lucan for her to take over"...
And TTNE has a pretty clear line of "The 3I was not a good thing, but the collapse and virus were indeed far worse."
¹
Bill the Galactic Hero, David Harris and Harry Harrison
²
Sten Allen Cole and Chris Bunch.
³
The Vorkosiverse Series, Lois McMaster Bujold
⁴
Falkenberg's Legion, Jerry Pournelle