In the OP I mentioned "why is it used as an apologetic for Orthodoxy". Apparently this statement was unclear. In reading some things about it, some seem to use it to point out the validity of Orthodoxy in contrast to other faiths, notably the Roman Catholic and Armenian. In the writings about it someone went so far as to say that since the True Orthodox split off it has been faked. The Patriarch of Jerusalem has a prominent role in the proceedings, and the whole thing seems to get used to underscore the validity of his position - something that I, as a Protestant, may need to give some thought to. We (Evangelical Presbyterians) do not have an official delegation or presence there, and it is only a logical step to surmise that, for some strange reason, we sent people and bribed the local government to keep out the patriarch of Jerusalem and let the head of our denomination do the kneeling and the praying and the initial holding of the candles and the coming out of the tomb, etc., strange things would happen. There is one split column in the place already. Why there would not be two, or something more dramatic, is something for me to ponder.
Perhaps it is not just a sign of the Resurrection but also an affirmation of the singular validity of the Orthodox faith. Perhaps. Or perhaps the PoJ stands in for all Christians.