You're contradicting yourself because you're not being specific, it's not "companies across europe" it's the native defense industries of only a few countries, Germany, France, UK and maybe Italy none are which the insane eastern states that would lynch a politican for negotiating with russia

The rest would blow a hole in their budget if they attempted to expand local industrial production of weapons beyond a certain point

And the big countries don't want to expand cause that will also blow a hole in their budget, Europe is ruled by Americanized ordoliberals, the cratering of millions of their citizen's livelihoods didn't stop them from cutting the state and a proxy war in Ukraine isn't gonna stop them either

They'll waste money on expensive overenineered American garbage and then call it a day and the Eastern states can go back to the Soviet Union to replenish their stock- oh wait no they can't they'll also have to buy trash Anerican weapon systems