I guess Hamilton won't engage further ... after the spontaneous immediate congratulation of Verstappen my guess is the team legals instructed him to walk away so as not to be seen to be legitimising the result (like your insurance company instructs you not to admit liability whatever the circumstances) ... poor position for him to be in .... team will want to fight it out in court, but as the 'face' of the team he will be the one seen as a 'bad loser' or 'poor sportsman' .... bad situation that really shows the need for robust rules and consistent decision making .... neither of which seemed to be much in evidence.
If I was Hamilton I'd want to walk away and pointedly claim the moral victory (which will become more and more evident as the administrative fallout plays through)... sadly I doubt the team will see it that way.
K