Defensive weapons are very much needed in Europe…
Indeed, hence most European defense companies experiencing somewhat incredible growth recently, with no signs of stopping.
Do we need Americans weapons? Unlikely and probably counter-productive long-term. Do we need European weapons? Hell yeah!
No they are not.
The amount of military spending europe has, is already higher than russia.
Russia clearly showed how incapable they are, they are not even able to present modern war technology at their freedom parade.
And china we don't fight china.
The new asymmetric reality is mostly short/medium range drones, ECMs and hypersonic missles. Loitering munitions are going to make tanks mostly obsolete and Jets are too expensive to risk over enemy territory that still has working radar/anti-air except for large shock&awe actions.
A lot of this stuff is hard to stop and too cheap to effectively stop economically anyhow, the best solution is distance and preemptive strikes at staging areas.