Catholicism holds that there is an entire community of believers, not just one person. That’s why it may seem complex.
But that is because God made many people, not just one person. Take all of Hebrews 11, especially the last verses.
We are all a body of Christ, not just an individual of Christ.
and.... ?
This allows you to pray to dead people?
Isn’t that like ancestor worship?
I guess its back to polytheism