He may be a blowhard but I think it is a good idea to have a realistic grasp on the situation. The Ukrainians have been losing ground and there are rumblings that they are having manpower issues. They are inflating inflicted Russian losses. Any decision to provide support and/or work with them to continue to fight has to have an endgame that is based on reality.
Do we think the endgame is for them to retake the territory they have lost? If the likelihood of that occurring is slim to none, we could get a negotiated settlement, continue to integrate Ukraine into Western military doctrine and weaponry, and not pull them into NATO, but still meet our goals vis a vis Russia's aggressiveness and expansion are tendencies of late.
They helped bleed the Russians but we are getting to the point where they are starting to bleed us of weapons stockpiles that put our security more at risk.