I see your point Joe but the WT did a very good job of overturning the French tax ruling. They might not be adept at lobbying etc. but they can afford very good lawyers and have a track record of spinning legal proceedings out for a long time. Don't forget as well that any ruling that sets some precedence for other religious organisations will attract massive interest from everyone from Scientologists to the Catholic Church. In fact, was there not some joint action or discussions along with other religions that the WTS was involved with a while back?
I do accept however that the child protection aspect of this particular ruling does cast a different light on things and it may be this factor that is the key that does push the authorities to pursue the case to it's conclusion.