The point being that if there are sentient beings, beings with free will, then they sin and are in need of a savior.
In theory.
I would rather have the pope agreeing to baptize space aliens than trying to get the UN to con countries into redistributing wealth-I realize a lot of his life has been spent in a socialist country-but it isn’t exactly a popular idea with most of us, and it makes him look way more out-of-touch than the alien remark.
Considering that we don’t have a method of propulsion fast enough to get us out of our neighborhood/solar system and back in a lifetime, and it may also be the case with beings someplace else, if they do exist-I doubt it will be anything to consider anytime soon...