Earlier quoted context omitted.
more like vendor lock
"I prefer the way this vendor does things" is not vendor lockin. "I hate the way this vendor does things, but I'm locked in and can't leave" is vendor lockin.
Google can offer this because you are using a single, fairly unified, ecosystem and they own both your account and browser. However, this ecosystem does not offer interoperability so you are effectively locked-in.
Ironically, this feature is exactly why I can't use Chrome or login on accounts on Android applications: this will auto-sync everything and log you into Google, make logging out very hard, enroll your devices on Google Workspace if that's a professional account, ...