Rob Pike is not a 'Googler' by birth or fame or identity. He was at Bell Labs and was on the team that created Unix, led the team creating Plan 9, co-created UTF-8, and did a bunch more - all long before Google existed. He was a legend before he deigned to join them and lend them his credibility.
Eh, and it was arguably a mistake to let him force Go on the rest of the organisation by way of starpower.
I was gonna say! Working at Bell Labs is a LOT more prestigious (and less humiliating) than working for Google, an advertising company.
It's like the old joke from Mad Magazine:
The Beatles? Weren't they Paul McCartney's backup band before Wings?