Man, just take a look at the game itself: it’s pure sci-fi!
Flying at super-light speed with warp, firing energy weapons, energy shields, small spaceships capable of exiting and entering atmosphere with fuel tanks as small as those of current cars (for the interceptor)…
None of the previous points are realistic (constructed and functional at least in POC), at best they’re theoratically possible.
Of course, all the laws of physics still apply, for instance going too fast in atmosphere will apply huge constraints on a ship and probably burn it… but that’s very different from human engineering, that may or may not find solutions for rapid atmosphere entry.
So please consider “laws of physics” first, then “gameplay”, then “human engineering” that you call “realism” in this case.
And to answer your previous question: yes, it makes sense. Not so long ago, early tanks could not rotate their canon on large angles. Their lighter equivalent, rifles, were quite easy to manipulate by the infantry. So you could, for lore reasons, consider the game as “early” ages of space journey and consider capital ships as “tanks” and interceptors as “infantry”.