The most prevalent stereotype when it comes to liberal arts students is that they're all technically illiterate. I'll say that many of the negative stereotypes related to that major aren't entirely the ignorance of outsiders. Either the liberal arts people themselves―at least the ones I've socialised with―revel in their bad image and perpetuate it, or it was their attitude and behaviour that gave rise to the bad stereotypes.
Here's the thing about career and liberal arts students in my experience: if you ask them, most of them will say they're focused on career, instead of studying liberal arts for the knowledge or their love for culture and all that. Some won't even shy away from telling you that they chose the major because it's easy, it has no math and science, it doesn't require as much commitment as medical or engineering, and other such reasons. But, of course, career building was never much the focus of liberal arts education.
Worse, a lot of them are pretty ignorant about other issues. If you ask them about a hot issue concerning world economics, for example, they'll say something along the lines of "I'm a literature/liberal arts person; I don't deal with matters involving economics." (Actually, this smugness also applies to most computer science students I know. They'll tell you that because they're IT people they can be ignorant about other issues. Of course, if I challenge them toe-to-toe, most of them don't even have that deep technical knowledge anyways.)
What you specified is the ideal way of how it all should go. Many people, from employers to "educators" (and I use the term loosely) and students yell about "soft skills" day and night, and ramble on and on about how things like leadership, management, problem solving and all that are important, but in most cases, they will flock to the easiest way―often taking shortcuts―to the end of the line.