For about 5% of the annual US defense spending we support a democracy, slap a despot, and degrade a primary enemy that justifies that enormous defense spending, while not losing a single US serviceman. As bonuses we buttress the world order we helped build in which wars of conquest are seriously frowned upon (thus discouraging future significant conflicts), galvanize NATO, and prove the efficacy of American weapon exports, intelligence, and western style training.
Ignoring the impacts on Ukrainian people and other consequences: to appease Putin would increase the risk of a broader conflict later that may require full engagement, which would be a disaster on many levels. The geopolitics of getting directly involved are seriously messy, but thus far this is a huge strategic win for the USA. With all sympathy and respect to Ukraine; if one could not have sustained peace, this is probably the next best outcome for our strategic aims
Someone explain the positives of appeasement? The weapons we designed and purchased to degrade the military of Russia wouldn't be used to degrade the military of Russia? Are we pretending to be worried about our military budget? Do we think Putin would grab a few more oblasts and then be totally cool?
Sarcasm aside, I really don't see how appeasement is a shorty term or long term strategic win for the USA.