But that system is not adequate to intercept anti-ship ballistic missiles even as point-defense.
If it were that easy the anti-missile problem would have been solved long ago.
Various articles don't give a speed for David's Sling, but it will replace the US Patriot anti-missile which Wikipedia says is Mach 5.
Israel also has the Arrow 3, a longer range anti-missile equivalent to the US RIM 161 which Wikipedia says hits high hypersonic speeds (Mach 10?).
The US today has nearly 100 anti-missile ships, each of which can carry nearly 100 anti-missile missiles, equal to or better than those of Israel.
So we're looking at the potential to deploy 10,000 anti-missiles on ships, to protect our carriers & other assets.
That's why I don't know where this idea comes from, that our guys can't defend themselves.
David's Sling anti-missile, equivalent to US Patriot:
Israeli Arrow 3 anti-missile, equivalent to US RIM 174: