Businesses which scale by hiring are much harder to grow and tend to be a lot less profitable. As a result, internet companies tend to see such businesses as not worth being in. Sure, there are lots of successful companies which operate this way, but Google sees it as an unacceptably high opportunity cost. Rather than pour resources into growing a scale by hiring business, they would rather put the resources toward a different business that they think they can scale with non-linear hiring.

Given this, it surprises me that Google is going after the enterprise cloud business. It is pretty well known that such businesses scale fairly linearly with sales and support staff. My understanding is that they know this and are attempting to scale the business this way instead of their usual strategy of ignoring the issue and hoping it will go away.