A controlled reentry comes at a cost. China and SpaceX are apparently betting that the added cost of a controlled reentry vastly outweighs the cost of debris from an uncontrolled reentry resulting in significant damage. Suppose a chunk of debris kills a cow. Nobody will have a cow over this. People will have a cow if a chunk of debris kills a person. But until then, it's a calculated risk.
Perhaps it's a poorly calculated risk, but it is a calculated risk nonetheless. The Ford Pinto case from almost 50 years ago comes to mind. Ford's advertising agency claimed that the "Pinto leaves you with that warm feeling". Sometimes, it left people with a bit too warm of a feeling. When hit from behind at a speed of 25 mph or more, the Pinto's gas tank would, without fail, rupture and the gasoline would burst into flames. People died. Even more people lived but suffered terrible burns. Ford vastly underrated how much a death lawsuit would cost, and didn't account at all for injuries that came close to death. (Lawsuits related to permanent disfiguring damage tend to cost even more than do lawsuits for premature death. Caskets are cheap. Lifetime replacement for permanent loss of income and for permanent payment for pain and suffering are not cheap.) One and a half million Pintos were recalled. All in all, it was a very poorly calculated risk on Ford's part.
We'll have to wait for lawsuits related to death, brain damage, permanent physical disfiguration, or significant property damage by an uncontrolled reentry to see whether China, SpaceX, et al. have made a poorly calculated risk. Or perhaps they have not, and their cold equations will turn out to be correct.