That cheap parts "may" work fine on a average to lower power level build but you also want to insist that they are still good enough for power levels that said person never has even owned. Bottom line is cheap parts are just that.....but to blissfully believe that they will work fine past average power levels in aspect of performance and reliability is just being naive. This also is the same reason that many guys experience issues with their cars that they can't figure out and or understand why.......it more times than not comes down to buying better parts than your local O'Rielly's can provide.
