The default answer to more work is more people. The manifesto rejects the default. The answer is more leverage — infrastructure that lets one operator do what used to take a team.
Headcount adds coordination cost with every hire. Infrastructure adds capacity with none. A well-built system runs at 3am without a standup, doesn't need onboarding, and doesn't forget the context it had last week.
This isn't anti-team dogma. It's a claim about sequence: build the leverage first, and hire only into the gaps the leverage can't close. Most gaps close.