The only one who lose here is not WRC or the fans (except those of Kubica of course), but Robert himself.
I agree with him, without a factory seat, if you are ambitous it will become a "waste of time" after a while... But it's sadly only his fault. With more factories coming in the sport, team principals are hungry for good drivers, they would not hesitate a moment to take him if he had became one of them, also considering the awareness he could bring towards their team. Unfortunately, even having a notable potential at the beginning of his WRC career, he didn't had the right approach to the sport.
Good luck for his new challenges.