Unfortunately, I agree with you that there other dark motives behind the defense of Ukraine than the sole and pure wish to defend a democracy in Eastern Europe. Sure, The United States have some political reasons to defend Ukraine as a nation, also ideological reasons. But I must wonder what is the company or entity manufacturing all those weapons and providing the arsenal to Zelensky. Even the United States army get their equipment from private contracts, so if they replenish their own storage of ammo and technology, those who are going to be the most benefited will be the shareholders of military stocks or the CEOs of privately owned factories.
If any of that is true, then it is a disgrace neither side of the mainstream media is talking about it.