This is a quite short-sighted point of view. The real challenge is to establish a stable new regime after toppling the old one. In the case of mainland China that has no prior experience at all as a democratic society, it would have a difficult time adapting (PRC before WWII doesn't count since it was unstable and higly corrupt). Also, a weak goverment is in danger of neglecting to address the internal challenges China faces (tensions with minorities, poverty in rural regions, environmental destruction).