I was also at Harvard in the 90s and was a physics major. I ended up in strategy consulting. The article is pretty much spot on, but I would add one more fact

I was also at Harvard in the 90s and was a physics major. I ended up in strategy consulting. The article is pretty much spot on, but I would add one more factor - it's a lot of fun to work with really talented people; thats one of the reasons people go to consulting/banking/law school. I interviewed with research labs and aerospace companies (areas I was interested in) and interviewed somewhat on a whim with strategy consulting firms (as the article points out, it's hard to miss them on campus). The people I met at the consulting firms were all really sharp people. The folks at some of the other places were uninspiring. So, I went to the consulting firm, and for the year and a half that I did it (before coming to my senses), it was easy to overlook _what_ we were doing, because it was great to work with people that challenged me creatively and intellectually and to solve hard problems ("hard" and "useful to the world" not being necessarily correlated). This dynamic creates a nice positive feedback loop. Once you have a high enough concentration of sharp people, it's easy to get more. Good startups leverage the same phenomenon.