Not sure why you think Google will be any different.
ISPs have local problems. Always. Some dope with a backhoe cuts the fiber feeding you place and you are down until they repair it.
A drunk hits a box somewhere and you're down. Availability for repair parts is an unknown.
(That was the issue with power after the tornado. Too out many HV towers and they didn't have enough parts available to replace that many, they had to be manufactured)
Now Charter is saying I should have service, but the "modem" isn't connecting.
Of course they never called me as promised when the earlier outage was corrected.
Google is working on plan to provide wireless internet services. You are right about the complexity, as the article here points out:
http://www.wsj.com/articles/googles-high-speed-web-plans-hit-snags-1471193165