Even if we postulate that it's more difficult to become a chef, or that fewer people are capable of becoming chefs, the economics of software - the borderline-nonexistent inventory and marginal cost of goods sold - conspire to make software engineers generally better paid than chefs. It's difficult to draw conclusions about how important the skill of this particular chef was to the success of Google, because we don't have a lot of data about "successful startups with chefs as early employees", but we do have a lot of data about "successful startups with talented engineers as early employees".