Theres no need for a chain guard if you are a solo operator, obv if you employ its a diff story.
My reel has the chain on the right, the on switch is to the left which i operate with my left hand, my right hand guides the hose on. How on earth is any part of my body going into the chain?
Not only that but the 12v system doesnt have the torque, i can stop the reel with my hand fairly easy.
Now i know it is possible i could put my hand into the chain cogs but its also possible i could trap my finger in the door or fall out of bed on a morning. Look at how many use ladders everyday, much higher risk of serious injury than a reel without a chain guard, especially since your hand should not be in the chain and if it is your other hand should not be switching it on at the same time!