Good thing you're not drinking the Kool Aid haha
I have to give credit to management consultants for one thing: they are phenomenal recruiters (in fact, a good "exit option" could be getting recruited into the Church of Scientology j/k).
Whether it's undergrad or MBA recruiting, they have this way of convincing newbie students (and not the cynical ex-consultants) that if you were to enter their hallowed doors, a golden path to the executive suite awaits you, even if you get "counseled out" (read: fired) after a few years.
Which couldn't be further from the truth. Yes, there are ex-consultants at high levels, but given the ARMY of people they churn through the consulting system year after year (they hire armies of MBAs, and turnover is very high as 80-90% get leave after 2-3 years, only to be replaced by fresh faced MBAs), of course a few are going to end up in the executive suite.
The reality is, a lot of the ex-consultants I have known end up in a comparable place in many industries as other MBAs who never went into consulting at all: most end up in middle to mid-senior management -- some in strategy, some operations, product management, it runs the gamut. And once they're in industry, how fast they get promoted then is a case-by-case circumstance (individual effort, luck, strong/poor company growth, politics, etc.).
So in sum, they end up just fine. That's the positive.
Consulting is a good place to start post-MBA if you don't know what you want to do right away. And unlike investment banking (or any financial services - research, sales/trading, asset mgmt, PE, etc.) you're less likely to get pigeon-holed. In other words, while you won't exactly be anywhere close to being a CEO type after only a few years at MBB, you have easier access to a broader range of middle management industry jobs than someone coming from financial services (because for the most part the skill set and knowledge you get as a consultant is broader).
So no, it's not the golden ticket or anything, but it's sort of like an "extended MBA" if you're unsure about what you want to do.
However, if you're sure about the industry you want to work in, then you really should just focus on getting into industry right after b-school, since as a mgmt consultant NO MATTER WHAT THE CONSULTING RECRUITERS TELL YOU OR PROMISE YOU -- as an associate you have very little control over the kinds of client engagements you work on. You may say you want to work on telco, but you work on what the partners bring in. If it's a coal mining project and you're available - you're going to be a coal mining expert for the next 6 months to maybe even a year. If you want to work with tech clients, the office may take note of that, but they will staff you on what client projects are brought in -- or you get shipped/rented by another office that desperately needs bodies (i.e. you're based in SF, but the Dallas office happens to be short staffed, and they need someone on a oil/gas project asap). The thing is, even the best intentioned firm partners and staffers can only do so much to accommodate an associate's interests -- they are still running a business, and they can't staff you on projects that don't exist.