This is also hyperbole. Mountain View is very dense compared to most of the suburban USA. There are numerous non-Google burrito, taco, Korean hot-pot, etc. places all with a few minutes’ walk of the Googleplex. I know because I’ve walked to them.
I dunno, define "few"? It's easily 20 minutes+ each way to get to a non-tech company building (maybe more if you're embedded in say Crittenden).
Pear Ave and the restaurants next to Sports Page are directly adjacent to buildings on the south end, but Maps does say you’re right about the stuff north on Rengstorff (about 20 minutes from building 42). I guess time flew and I didn’t mind the walk. Faster if you GBike it.