LOL - you make several misleading statements, get called on it, and now you're implying that the moderators are going to come to your rescue? Um, good luck with that.
As for OP, why is only the IL2 being uncounterable a balance problem? The similarly priced Railway, Stuka, and 280mm do the same thing, have no counters, but somehow don't create a balance problem?
Well the others are arty: cover a different type of area, have a more spread damages and take longer to land. While IL2 Bombing has no RNG involve because it is a fix patern and can be as good as regular Arty against structure while being really good against tank (1 strike seems close to Oneshot an heavy tank).
So you end up with a faster, more reliable/precise tool which is more versatile. And since the best comparison seems to be the Stuka dive, I think it can't actually One-shot any medium and above tank (I wonder if it is enough to kill a light though).
So if the IL2 is invincible like the Stuka, stuka dive have nothing more than having a long loud song instead of red flares while being worst against tank.
Conclusion: IL2 is better while having no drawback/counter.
And that is a Balance issue.