The way I see if if u buy a house IRL it still costs you weekly and monthly Bill's, if the Royal navy purchases a new aircraft carrier it still costs the navy for the up keep of the ship, if u don't spend money on ur house it eventually falls apart, if the navy doesn't spend ooodles of money on a ship it falls apart and is eventually decommissioned,
If ED is supposed to be a simulator more than a game then its sticking to real life, it could be worse you could have to purchase more NPC crew to man said carrier and then you'd be paying a weekly crew wage bill in top of your up keep.
Why moan about something before you even get chance to try it out, do you tell a date you don't like her favourite restaurant even tho you never eaten there?
Personally i never found the fleet carrier a must have item.