Which men do Catholics think are God? Which men do Catholics think have a right to create doctrine out of men's opinions?
The RCC teaches that its priestcraft are made up of men who are an "alter Christus," "another Christ."
Blasphemy, no matter how Rome tries to spin it.
Which men do Catholics think have a right to create doctrine out of men's opinions?
Various popes. For 1800 years Mary was not said to have been assumed into heaven bodily. Then some pope gets it in his head to declare the "Assumption of Mary" as doctrine.
Christianity does not rely on fallible men for its doctrines. Christianity relies on God's word alone.
It certainly wasn't the Sisters of Mercy or God's word which created the dogma of The Bodily Assumption Of Mary.