Counterpoint: There is no "right" way to handle anonymous accusations like this(Except if its undeniably true and you just admit to it), if he was immediately out with a prepared statement it could just be seen as him trying to save face and his career instead, plus like others said if someone is neurodivergent or has other things going on that impacts how they handle crisis situations its not suspicious to shut themselves off from society.

You can think what you want if its a good way or not to handle it but it shouldnt confirm or dispell the accusations, the accusations are what they are and if there is evidence for them then that will be what confirms them.