It’s not that the US doesn’t produce these weapons as much as Eastern Europeans approach to modern warfare is yeeting rounds 24/7.
Missiles are extremely expensive and you’ll soon run out of them during a long war of attrition (especially in a symmetrical conflict like in Ukraine)
Culture has nothing to with that.
Disclaimer: I consider leveling cities with the goal to displace people to be disgusting, and a borderline war crime. Regardless of the parties or reasons involved.