Florida Death Row

I'm watching Death Row: The Final 24 Hours on Discovery Channel. They say that in Florida (and I'm sure they do something similar in other states) they post a guard for the final 24 hours before execution at the inmate's cell door to make sure he doesn't attempt suicide. WHY. WHO CARES!!??!!! If he does it, just saves money! WTF! As a side note, all the states require before lethal injection that the inmate's arm be wiped with alcohol before the IV is inserted. WHY????!!!!