Some users would never even install apps that asked for too many static permissions on the Play page.
But now, if an app seems to meet their needs and they aren't sure, some of them will go ahead and install it just to try it out. How much can one run hurt after all? Due to unresolved questions or sunk cost dilemmas, they may even grant dynamic permissions. How much can one run hurt after all?
So this will manipulate a percentage of reluctant users into data-providing users by hiding a reason for their reluctance. I'm inclined to suspect it'll benefit Google's ad impressions business and that's the actual motivation, not "feature parity" with Apple.