Rockets are just really expensive. It's hard to get stuff into orbit cheaply, and even now I wouldn't be surprised if Starlink is a net-loss product for SpaceX still.

Google's business strategy for the longest time has revolved around selling software services. AdSense, YouTube, Google Drive - all of these are services they can scale up by turning a knob and waiting for servers to spin up. Rocket science is a whole different ball game, and one that most businesses simply can't justify regardless of the scale they're at.