As a computer science student who has planned his academic career with a commercial one in mind, but is considering tacking on a philosophy major because he just can't stay away from it, I agree. This is important. I hope that anyone seeking to get a degree in philosophy in order to pursue a career in philosophy is met with success. But anyone with such intent should know by now or very soon learn that academic philosophy is very difficult, extremely competitive, and generally requires a LOT of schooling. Aside from teaching, major success in philosophy only happens for a lucky few, and even some of today's most important philosophers were largely unrecognized or undervalued during their lifetime. (The political philosophy which grounds the legal tradition of the US and its Constitution, for example, pre-dates it by several generations.)
The mistake some people make is that a degree in philosophy is, or ought to be, a step towards a career elsewhere. If you are currently pursuing a degree in philosophy, but only because you enjoy that subject for your general education, make other plans for a career elsewhere. Don't pretend that you can do otherwise.
It sucks, because there are many wonderful pursuits that are hard to making a living on. I think they should still be pursued wherever that's possible, but we should just be honest with ourselves about (a) the difficulty of attaining success in our fields, (b) the motive for our pursuit of knowledge, and (c) whether or not the initial plan (a single bachelor's degree --> a professional career --> no more formal education ever again) will satisfy all our goals realistically.
We absolutely need good philosophers and psychologists, not to mention artists of all sorts. But there's no shortage of people who just kinda dug those subjects in their twenties, so don't pretend that kinda digging something for a few years is a career move!