You seem to disregard the nature of gods that had been outlayed to the Player by following the different Stories.
A Gods Power is based on the Followers and worship a god/goddess receives.
Isha was barely worshiped even in her prime, after her fall she lost all worship and had to sacrfice the little Power she had left to stay alive.
Athia on the otherhand was the most influental goddess at date, with many churches dedicated to her alone.
For Isha a fanatical believer of Athia was the most horrific thing in the world, which is why she isolated herself in the backwater and most dangerous area for any human she could find.
Dealing with a single target from the shadows was easier than to deal with half of humanity and less dangerous to herself.
It's not quiet clear how blessings work, think about it Emily is blessed apparently by Uldar when the church accepts her into their services by opening an orphanage, though the history in the abondened church in the darkwoods indicate he suffered greatly from his affair with Isha... maybe even fell to earth himself (I am still considering the chance that he is behind the Pact of the Wolf).
Also Emily while blessed is not protected from MCs Power even after receiving the blessing... likely because she can't tab into Uldars Powerpool herself, since she is no Priestess.
Mira received a blessing by apparently Athia, though Athia can fall to earth before you complete her story... so either she won't be blessed in that case (which is unlikely considering that her entire story is based on that) or the blessing is initiated by the aspect the Priests and Priestesses pray towards... so more of linking them with a Powerpool.
Mira is affected by MCs cum, but she notices and tabs into Athias Powerpool in order to negate the Powers of the MC