Dunno how big an issue it is but I assume the generic "holo-image" ship is easier to render than a proper, custom ship c/w livery and ship-kit.
I'd prefer it if the game starts up as quickly as possible rather than spends time showing me the ship I would be flying if the game wasn't still loading.
Having said that, I do agree that the game should try to spend some time showing us the ships we've paid real money for liveries and ship-kits for.
It'd be nice if, for example, the game cut to an external camera while we're riding the elevator in and out of the hangar and, perhaps, cut to an external view of the ship when the FSD countdown starts.
I realise some people want the "immersive" experience 100% of the time so there'd need to be an "enable cinematics" toggle in the menu too.