This is a direct result of the 2016 WikiLeaks releases, which were thought to have helped produce an electoral outcome that the elite media/cultural class (i.e. those who influence Twitter) found appalling. So they reverse-engineer the rules to prevent a repeat of that outcome

"Content obtained without authorization" and "possibly illegally obtained materials" are standards so vague, contradictory, and unenforceable that they shouldn& #39;t even be thought as constituting any kind of real "standard." That& #39;s not the purpose of the policy

The purpose of the policy is simple: to provide a public rationale for whatever measures are necessary to prevent the kind of "interference" these platforms were badgered into taking responsibility for vis-a-vis the 2016 election, which allegedly enabled a victory for Trump