He is mad that clumped up falls get one shotted by a 90 mm main gun from a heavy tank. I wouldn't even quote him in the future if I were you.
By that same logic a single shot from medium/heavy tanks should be enough to turn vehicles like M20/scout car/halftracks into twisted balls of metal with no chance of escape, but I don't see you complaining about it.
The person you quoted had a perfectly valid point that if Relic nerfs one-shotting/overperforming units/abilities in every patch and says that serves the point of "allowing the opposing player time to react", that should be the case with the Pershing/KT/whatever BS one-shots as well.
But no, "l2p when I have big guns" is more valid than asking for reasonable game balance of course.