It doesn't matter, if all we're considering is the meaning of Jesus' death.
But I agree with many other posters that its important to the WTS because they try to use this to differentiate themselves from other denominations. Portraying other groups as tainted and false while they are more "pure" in their "worship".
So given that, its important to me, in that it shows the antipathy of the WTS to information/evidence that refutes any of their beliefs. Instead of taking an honest objective look at old/new evidence, they either try to discredit it or never even bring it up. For a group that supposedly is spreading "the Truth", they sure have a strong aversion to implementing and following processes of earnest truth seekers.