That's not my point. My point is, Do you pray, individually, for every single person in this world, for every single illness, every single conflict? In the opening prayer of the Catholic Mass we ask (and therefore everyone is asking me) to pray for them.
Do you see where I am going with this? I try seriously to pray for the entire congregation. I don't know their names. I don't know their voices. I only know they are asking for my prayers. So I offer prayers to God on their behalf.
So what if there are a crowd of millions asking Mary to join in their prayers? We join in prayer for our whole parish, we join in prayer for our whole world, but you seem to sincerely believe that Mary cannot join in prayer for those who ask her to join in prayer. That is like telling me that I cannot join in prayer for the congregation that asks for my prayers, or me telling you that it is impossible for you to pray for the world.