[mcagl]

I can print schoolwork and concert tickets from my tablet already using my wifi LAN and my wifi/eth printer (with firewall rules that block traffic to/from the printer to/from the internet), without sending them to google.

I don't care which type of file I print, I simply want to print them privately. As it it's already possible without GCP, I don't catch why people use it.

[Spooky23]

Some people like to print things without being on a wifi network for various reasons. Or be able to print something on the go or when working outside.

Another use case are people who are living in a Google Docs world. It's easy to print "natively" out of that environment and not be aware of where you are from a network POV.

I agree with your POV btw, just pointing out where many people come from when they use this solution.