If you're gonna be sarcastic maybe actually know what you're talking about. Of course things like sound design, composition, mixing, etc. are important but if you have shitty samples your track is going to sound like shit compared to commercially produced tracks. There's nothing wrong with using whatever samples you want to produce whatever kind of music you want, but for popular genres like trance/dubstep/future bass you're just going to sound bad with bad samples, and conversely you're not going to sound good just because you used good samples.
And for your point about Tiesto, sure? I don't know much about music back then. But if you use the samples he used back then to build a track today, it's going to sound pretty terrible compared to industry standard tracks which proves my point.