The people I know with expensive trucks still get everything delivered anyway. There’s always some excuse why their super versatile amazingly useful truck isn’t quite the right tool for the job, but somehow it’s always the right tool to drive around town to their office job or the grocery store. Literally makes zero sense, ever.
How can you possibly think the US military, or any sovereign country, will magically spend an extra $165B a year on meat a year if all of the current consumers magically go vegetarian? Who exactly is going to eat a bunch of extra meat? There will just be fewer meat sales, period, ignoring a short term price drop if everyone magically goes vegetarian on the same day.