His peers -- Satya Nadella, Jeff Bezos, Tim Cook, and Mark Zuckerberg -- all deeply understand and concern themselves with their companies' respective places in the world. They think twenty years into the future and frequently take risks to mitigate a changing landscape and position themselves for future wins.
Sundar Pichai isn't one to make bold bets. His company is a fat pig suckling on ad money. Google itself is completely drunk, comatose.
Google needs bold leadership. If nothing changes, it will eventually fall into decline and become a footnote.
Not only can this happen, it's already happened many times before.