It is not rocket science........well I guess it is
; but this issue is entirely about a policy decision on the part of the Chinese government not to engineer a planned entry. You can roll out a bunch of "whataboutisms" , but that does not change the facts. The current norm for space capable nations is to design a controlled re-entry system for all space debris that could survive re-entry. China did not do that and should therefore be called out for it.