The frequency of the full house hand happening is less and the probability of it is only 3744 while using a standard card deck but if you compare that to the straight’s probability of 10,200 then surely you have your answer.
If you still don’t get us and you are wondering does the full house really beat a straight in poker? Then we have facts backed by figures for you. The rule is that the higher the probability the lower that hand will be on the poker hand ranking thus the full house will be able to beat the straight. Full houses have a low probability while the straights have a high probability.