So.....there is no proof that these "miracles" actually do bring people to Tradition. Why do you continue to defend them and Bishop Williamson? Isn't it possible (and much more probable) that you're just too wedded to Bishop Williamson that you can't see clearly?
The purpose would be to instill faith, in the hopes of saving their souls.
I do not hold the position that all conciliarists are damned (and therefore do not see it as absolutely necessary that the miracles must be false unless it can be shown that all who witnessed them have arrived in Tradition).
As for your commments about being too wedded to +Williamson, I have no doubt you'd like that to be true. But the fact is that I wrote a study in 2016 which gave doctrinal (not sentimental) reasons for my position.
I would allege, on the contrary, that your obtuseness is predicated on your desire to protect a narrative, and that explains your determination here.