But this is the opinion of the direct descendant of Peter who speaks for God Himself (as if God is incapable of speaking for Himself) Ive been told on multiple other threads that the RCC derives its authority from the popes that sit on peter’s throne. Apparently this is true only when convenient
Wrong.
You need to study up on Catholic theology and doctrine.
Papal infallibility only applies to doctrine on issues of faith and morals. And those elements themselves are narrowly defined.
If the Pope says the Red Sox are better than the Yankees, or eating fatty foods is sinful, or that CO2 will kill the planet, he’s out of his field.