On a fundamental level, I do understand the core point you are making, and the emotion that drives it.
I just think WT is one of the rare examples where it does not apply, because it can’t apply. Let me paint a scenario for you :
Imagine there are two premiums, added at the same time. One (A) is sold at 10.0. One (B) is sold at 11.0. It’s hard to gauge how vehicles will perform before release, so initial BR’s are often just proprietary.
It’s quickly obvious after the update that Premium A is really struggling at 10.0. Conversely, it’s quickly obvious premium B is really over-powered at 11.0.
So what would you have Gaijin do? Just ignore the problem, let one suffer and one dominate, because that’s the experience people paid for, many of whom pre-ordered, with no idea what gameplay would actually look like for these vehicles ?
But then to complicate things further, A and B are not the only premiums. C-Z also exist in this BR range. All of them are being negatively impacted by this too. People who purchased those are demanding you change A and B’s battle rating, so now what?
You’ve got A who wants to go down to 9.7, but C who is 8.7 will be furious if he’s now asked to fight A. You’ve got B who doesn’t want to go up, but you’ve got D who’s 10.0 and furious he’s being forced to fight this overpowered newcomer in B.
Point I’m making is, there’s like 2,000+ vehicles in this game. Hundreds of them were purchased. All of them are in literal and metaphorical conflict with one another. It is legitimately impossible to maintain the gameplay experience when new stuff gets added, so Gaijin have never pretended to do so.