[what's up]

Is she worthy of communion by the living

Mary is not omniscient. She cannot hear the prayers of all the people praying/speaking to her because she is only human.

[Alberta's Child]

She cannot hear the prayers of all the people praying/speaking to her because she is only human.

The audacity of this statement is astonishing. You have no idea what someone can or cannot hear once she has passed from this world into the next.