Google maps snags your location too.
And Niantic (who made the game) is backed by Google. So google could probably tie all that shit together anyway.
But yes, the game was really overreaching in its requesting permissions. There is no reason it should have access to all your texts and email and photos.
It could be malice or incompetence. I have done similar things where I asked for it all to make sure it worked and then paired it back to what I actually needed. But I am also a dude in his mom’s backyard and they had 30 million of funding…