In the early stages of the “special military operation,” Putin was making little effort to mobilize public support for the conflict, largely because he didn’t think it was necessary. It was logical at that time to take the position that any NATO response should be similarly restrained in order to avoid escalation from the Russian side.
But things have changed. Putin has now taken every imaginable measure to win the war short of the use of weapons of mass destruction, which he has to assume is a red line for NATO. He has also shown no interest in any meaningful form of negotiation, probably because he thinks the GOP will ultimately hand Ukraine to him on a platter. How can he be driven to the bargaining table under these conditions?
You can argue that openly providing Ukraine with the weapons necessary to recapture Crimea would do the trick. There would obviously be risk involved; Putin might respond by using weapons of mass destruction or attacking NATO rather than by offering a reasonable deal that would avoid the potential of a humiliating defeat. Would the risk be worth it? It’s debatable.