That's not surprising. The link you provided is not evidence that "Quick Time is full of adware and spyware". Evidently, you are misinformed about the difference between a vulnerability and actual malware.
Call it what you want. All I know is that every time QuickTime has been loaded for some two-bit video, it leaves spyware/advare that had to be cleaned up. Maybe the content left it. In any event, QuickTime isn't really that important to load, so it has been eliminated.