If you think that a veto on Western security assistance is walking away from all sorts of thing, then I can see the point.
If the U.S. piggy bank is dry, and no one with a serious army is willing to send troops, once one has ploughed through all of the military surplus, then this point is no longer nearly as attractive.
If we have Poland’s back, and the other adjoining members of NATO are fine with Ukraine as a buffer state-—then welcome to being a buffer state. It isn’t ideal, but not everyone can be an empire, and even empires aren’t empires forever.
Empires are especially not empires forever.
Well I think if you tell a country they can’t import weapons, you are basically neutering them. If Ukraine has natural resources to export, or land to transit through, Ukraine would need defenses. So yeah, I can see them rejecting that deal.
Trump maybe came up with a solution though. If we and Europe are partners in exploring and exporting the resources then it is a sort of security guarantee in that our vested interests and our people would be put at risk in a future war.