As long as our enemies have lots of tanks, we'll need ours to be able to kill theirs, possibly on a large scale.
Scouts Out! Cavalry Ho!
It is important to note that WWII US tactics were to use tank destroyers against enemy guns. M-10s, M-18s and M-36s were all effective, and served as artillery between enemy armor assaults.
Well, it doesn’t take a tank to kill a tank.
It was harder before, when tank armor was advancing but anti-tank weaponry was not. TOW to Hellfire to Javelin. Our infantry is more capable against tanks than ever, especially in the cities, where the “asymetric” part really comes into play.
And, as a matter of logistics, it is increasingly difficult to get large tanks into the theaters where such warfare is likely.
Sure, keep a good supply of excellent tanks handy, but don’t count on those tanks to be there every time you need them. We learned thatas recently as 1993.