Boaby... While I have to admit that Carly's project seems pretty normal / not particularly inspiring, it is the reason I moved to a strategy consultancy from industry. It covers a broad scope of skills and can only be good for your career to work on.
Working with senior clients on such a project lends it respectability and makes it more likely to be accepted and implemented. It means that what you're doing is more likely to matter and is more likely to have an impact.
Within industry, you typically deal with the lowest denominator - be it a project manager etc., whereas within consulting it is much more likely that you will get access to actual decision makers within companies.
This is exciting to relatively junior people as we get to a) directly influence a much wider sphere and b) get to work with people who to be frank aren't plebs - they have made it to a senior level for a reason - they stretch you intellectually, in terms of delivery, or even both.
In short, they're more interesting to work for / with.