Samsung do not always allow bloat to be disabled. I have a Samsung tablet (UK, offline stock) and there are some perfectly ordinary apps (Evernote and Flipboard for example) that have nevertheless not only been pre-installed but cannot be disabled without root. I can only assume that the developers paid them to do this, but that is speculation on my part.
So if they are prepared to do that with apps that have no system function at all, I'm not surprised that their version of the Cheetah Mobile apps, which do claim to be doing system management cannot, be disabled. The question is, what functions can you turn off via their settings? Leaving aside wariness about the people who developed this stuff, a lot of what it can do is quite counter-productive (the task killer for example).