you said it , it is because you pay more for electricity, and you don't need to have to do with all the hassle about shipping time, customs , scammer that won't send you anything, or that will send you damaged item, or malfunctional one
the risk are in both cases, the difference is that one is faster to establish than the other
people also dont like dealing with the noise and heat the miner causes either. in addition, with cloud mining, people do not have to perform any sort of maintenance on miners, or worry in case a miner breaks.