Right, the weapons that aren't being used in Ukraine because Russia has actual air defence aren't being depleted. Things that are being used like artillery shells and ATACMS, are very much being depleted, and that's being admitted openly now. Furthermore, US has to be everywhere at once to maintain the empire. There's Ukraine, Africa, Latin America, West Asia, Korea, Japan, Philippines, etc. US has to supply weapons to all these regions, and as it becomes increasingly challenged across the globe, it's starting to have to pick its battles. Hence why US is being kicked out of Africa now.