The vast categorization was a good idea in the early years of introduction. In premium ICEs, every train had a different feature list, so categorization as Shatabdi wasn't a good idea. Same goes for Humsafars, GRs and Antyodayas.
Every train category came with a unique feature list and fare structure. But now when every train running out there is a red/blue LHB, there's no sense in multiple categories. VBs can be a different category until the trains they're supposed to replace have their codal lives left.
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VB isn't an issue. It's the politics that has come in between. If the New Giridih and Brahmapur like regions get their first train as VB, then there's definitely an issue with the political structure. And if people are voting on the basis of a train which they'd hardly board, then you can't really do anything.
But yeah, instead of questioning the RB, the politicians, the government for these stupid decisions, people here bash the train, berate the people who board it. And then there are a few people who'd support this madness even if the train runs practically empty. So yeah, in short, we're doomed.