Sure but it's rare to successfully transition. The ad market is very political and depends on connections, not product. Google salespeople are also known as "order takers" since they don't really need to sell, companies always buy them by default.

It's the opposite in enterprise tech where Google is the underdog and needs to do quite a bit of selling, and base it on the strength of the product and functionality. GCP is hiring strongly for enterprise/software sales experience but struggling with the leadership to use them effectively.

There's plenty of margins in cloud though. AWS has proven it and GCP has the potential to be bigger than their ads business, but I agree that it's not currently as lucrative today.