YOu'll notice this is much better quality, and for less.
... and would take time to assemble and test and would not come with support if you messed up the assembly somewhere.
Buying a pre-built is about more than just hardware, you pay for assembly and warranty. I dont see why you would object to Toms having a forum for pre-builts. I say bring on the pre-builts and let us demonstrate the savings and quality of build it yourself. People can decide for themselves if the savings and quality is worth the effort and risk of building it themselves.
If anything I think having a bunch of questions and discussion to Cyberpowers builds might make them a better company as there will be some fairly knowledgeable third party opinions about what they are doing.