The latest military aid package is crucial as China takes an increasingly aggressive stance toward the self-ruled island. Any conflict in the region would gravely weaken the US' position and allow the PRC to take one step further towards global hegemony, which is why Washington must speed up the delivery of weapons to help the island defend itself.
Though the US doesn't officially recognize Taiwan, it wants to boost its defenses just to weaken the one-China principle it claims to acknowledge. Under the pretense of providing self-defense, Washington is turning Taiwan into an ammunition depot, creating more volatility in the region.
There's a 60% chance that the US will respond with military force if China invades Taiwan before 2035, according to the Metaculus prediction community.