You'd want a work car without dome lights or sun visors? Seriously? I have trouble when some guy who drives a Lexus IS350 complains about paying for a car with sun visors and dome lights, "work car" or otherwise. Just buy the SE, which is still pretty darned cheap in the grand scheme of things. The S is like a car that got taken off the assembly line 20% before the end of the line.
The raison d'etre of the Fiesta S is the lowest possible price. That's why there's no CD player, no frickin dome lights, no frickin' sun visors, etc. You can make a sedan cheaper than a hatch, so they made the Fiesta S a sedan. I'm betting that the S will be a statistically-insignificant portion of their sales compared to the SE and the SES/SEL, so there wasn't enough incentive for them to offer the S in more than one body style. And as long as they were just doing one, they went with the cheapest.