Does the Milky Way Galaxy have a function?

Answer 1

No. I can state unequivocally and without fear of contradiction that is has no function at all. It's just there.

On the other hand, it does happen to be the environment in which our sun came to become a star, and the sun, in turn,
furnished the environment in which the earth formed and eventually came to host life.

That's not to say that the 'function' of the Milky Way Galaxy is to furnish a large-scale platform in which the
conditions necessary to the existence of human life on earth can exist . . . that would be too spooky.

For that matter, I'm not even sure what the function of human life on earth is, or if it even has one. But if it has, and
you can explain what it is, then maybe that's not too different from whatever the function of the Milky Way Galaxy is.