Jesus? Sisko didn't die for anybody's sins.
I disagree with a seasoned Captain or Admiral being needed for the job. They were sent to provide a buffer between the Bajorans and Cardassians and see if the Bajorans would join the Federation. You don't need a seasoned Captain or Admiral for that, especially when they place was practically dead with people still abandoning it.
I could just imagine an Admiral’s response to being assigned there: “What? And where is that again? Okay, and you want me
to run along to a nearly abandoned space station with a security detail to see if a conquered and struggling people would want to join a large Federation of planets that could protect them while they rebuild. That doesn’t seem like much of a challenge. Are you sure you don’t have a fleet for me to run or something?”