That is not true at all, I blow through munitions like crazy... Moltovs, fire up, flamethrower upgrade, mines, Half Track Upgrade, Precision Strike (Mortar, Katusha, or Howtizer) , Bombing Run. Between all of that I NEVER float...
You can burn through munitions late game with bomb strikes but early game Ostheer has so many more options to spend munitions on (that are more necessary and costly). As Soviets if you don't have a surplus going in to the mid game, you either squandered on abilities when you didn't need to use them like excessive use of oorah, ZiS barrage, and sniper flare, or you just did a bad job holding munition points.
And how can you honestly say that when you put down a mine you're relying on luck? I put down tons of Tellers to counter tier 3 rush, and they are well placed. A strategically placed teller is NOT luck... Are you going to say when I bate you into a Teller, that's luck too?
If you have "tons" of tellers in anticipation of T3, opponent must have played pretty badly. Either he had abysmal map control for the majority of the game, or he should have punished you for your lack of munitions spent on other things such as T2 vehicle upgrades, healing, Gren upgrades, etc. If you do have "tons" of tellers that is somewhat reliable but your opponent should be face palming for allowing you to get in to that position in the first place.
In most scenarios vs a competent player, you are relying on him driving in to 1-2 tellers which is definitely luck. You can probably count on him to hit it at some point in a long game, but it is definitely not going to be a reliable counter for a lone rushed vehicle. Maybe you can get some players to fall for your bait, but you will never tempt me to chase something over a point I didn't consider safe anyways.