So you’d rather the Lithuanians not pay for their own defense and just have the US pay for it like we always do?
Russia clearly can’t be trusted and even their ‘ally’ Belarus doesn’t trust Russia to base troops inside Belarus. Preparing to fight off the Russians is the only way to deter them so if the weapons are never needed then the money spent on them is a sound investment.
Just ask the Georgians and Ukrianians if a decent military is a waste of money.
Those Boxers wouldn’t last two minutes against the Russians, as I said above, they are a waste of money, and obsolete before they hit the road.
If the Lithuanians are really interested in defense, and not in awarding contracts to pals, they would invest in survivable weapons systems and tactics. I can think of plenty of stuff I would stockpile to fight the Red Army, but APCs that get incinerated at the get-go wouldn’t make the list.