Many factors could account for the problem of xx.We cannot arbitrarily conclude it is a fault or not,just as a person cannot be labeled as a good man or a bad one,in other words,every coin has two sides,the rather that the problem of XXX is so complicated.
The reason for the problem of XX to appear is multi-fold. We cannot simply judge and conclude whether it is right or wrong, just like how one should not casually judge a person as good or bad, and how a coin has two sides. Nevertheless, the problem with XXX is indeed very complex.