For a Head of Sales overseeing 4 Account Executives (AEs), it may be reasonable to have them carry a small quota temporarily if necessary to meet revenue goals.
However, the primary focus of the Head of Sales should be on hiring, onboarding, and enabling the AEs to succeed, rather than closing deals themselves.
The Head of Sales should be focused on hiring more AEs, ensuring current reps hit quota, and establishing repeatable processes for pipeline management and deal closing.
While it can be beneficial for a new VP of Sales or CRO to 'carry a bag' initially to learn the product, the focus should transition towards a leadership role for long-term growth.