Yes funding Ukraines effort is cheaper than sending troops or eventually fighting with the UN. The “Biden Doctrine” was, despite what you are told to believe, moving along quite well. How long did you think Ukraine would last? Russian forces are depleted and in a virtual stalemate until your hero tried to come to the rescue. Being susceptible to influence, having apparent obligations to Putin and wanting to leave a legacy while playing to his crowd seems to be pulling your hero in many different directions.