That's just it, though. If it doesn't carry any sort of possibility of being enforced, well... why bother? I could just go with the easier-to-understand license, like someone upthread mentioned.
If we're going to see the promised tech ecosystem that GPL's authors aimed to provide, we're going to need more people to take it seriously. Most people don't want to take it seriously, and if that's the case, we're better off if they just went with MIT/BSD.
It doesn't force you to go after them.
With MIT, you Google would have no obligation at all to provide anything.