doesnt make sense - laser beams are easy to code, you think we should we have them? I'm guessing not.
Realism is a requirement, but our realism is such a grey area (Combat Trim, Custom Gunsights, Pony vs Pony, Standard units on indicators, indicators that are too effective, English writing on foreign aircraft, etc), that a custom attitude indicator isn't beyond reason. That's why "it's not realistic" is not a sufficient justification for refusing a custom attitude indicator.
Laser beams on the other hand are so unrealistic that rejecting them on the basis on the realism is perfectly justified. Not to mention the adverse gameplay implications.
To "win" the argument, you need to provide both an alternative (which everybody has), and a reason why the original idea is worse than the alternative (in this case, the difficulty of either completely changing the skin system or manually changing every skin).
Having one without the other is half-baked. If the idea is difficult to implement but necessary (and justified/realistic) for the game, the rejection should fail. If the idea is unnecessary (but within the bounds of reason - no laser cannons) for the game but easy to implement, the rejection should once again fail. That isn't to say that the idea should be implemented immediately (priorities come into play here), but it should not be rejected. It may be on the bottom of the list, but at least it makes the list.
Only if the idea is both difficult to implement and unnecessary (or beyond reasonable reality) should the proposal be outright rejected.