Arguably that means you have bad easy-to-game metrics. I wouldn't call what many (most?) Googlers do "impactful". More like "Let's keep a bunch of smart people busy so they don't get hired by our competition"

If the service you built withers away when you move to a different team, it was a pet project that The Business doesn't care about (because it has zero impact). Literally the definition of a bullshit busywork job :)