It’s slightly more nuanced than that. Investment banks and consultancy companies are really interested in graduates who are smart and articulate. The nature of their degree is not that relevant.

I know an extremely clever young woman who graduated in performance arts. She had no difficulty in getting a job at a top tier consultancy company. This company was far more interested in her than some mediocre plodder who hacked his way through a comp. Sci degree.

It’s not that these degrees are totally without value. Most banks and consultancies accept any quantitative degree as long as it’s from a prestigious university.

But if you know you’re going into banking anyway you might as well do something vaguely relevant like accounting, economics or statistics.