Maybe it would be justified, I don't know. However u should realize that the server will close eventually because nothing lasts forever. We dont know when, maybe this year, maybe in 5 years, maybe in 10 or 20 years but it is simply inevitable. Sunken cost will remain a sunken cost if u never plan to RMT your stuff.
To all of the people saying that it is easy to level up and join end game content: you completely miss the point (in my opinion). At current state it is difficult to enjoy the game casually. Lets say u are a new player and u join here. For some time (weeks or months, depends on activity) u have to lvl basically on your own in order to grow to a reasonable level where u can be used as meatshield for big guys, and lvling alone is not very fun. After u get to that high level u realize that in order to keep progressing u really have to dedicate a lot of time or/and money, especially if u don't want to play top farmer class.
I have played casually on and off since the start and for 2 or 3 years you could just log in, join a random pt in EV, Cruma, ABG, whatever, play for 2 hours, log out and not give a shit. U were progressing slowly but u did. Right now u lvl up quickly to high levels using all the free stuff and all the raid bosses and then to progress even a little u have to dedicate much more time (play in CP) and/or money (to get a decent equip, otherwise u are just meat).