[Endwalker Spoilers] The Echo and the Blessing of Light

[Theozilla]

IIRC our Blessing of Light was somehow just giving protection to people from getting kidnapped in the Rising Stones itself as a safe haven location, otherwise the Ascians could have just waited whenever the WoL wasn’t at the Rising Stones and nab Tupsimati and Minfilia then. So I don’t think the Blessing of Light ever had the power to protect us (or other individuals) from being teleported by Ascians in general.
And the WoL’s Blessing of Light was the only one capable of protecting the Rising Stones specifically because it was powered up to the max with six Crystals of Light, hence why Minfilia’s own Blessing of Light didn’t provide the Rising Stones with the same warding protection.

As for why the Ascians never tried to nab us before then, we’ll for ARR they probably didn’t view us as a worthy threat, and then after ARR Elidibus believed he could manipulate us to their benefit, so kidnapping us wouldn’t be an option on the table. And by the end of Heavensward, the WoL was probably too dangerous to try to kidnap/teleport us.
Fandaniel only did so because he had the element of surprise to get the jump on us, and while Anima’s roar was causing mass confusion, so it was enough discombobulation to nab us and then immediately use the soul extraction machine on us.