While this is usually true in Perl, learning how different sorts work, how to implement them yourself, bigOh analysis of them, and under what scenarios they should or should not be used have great value.
When in college, we had two schools teaching "computer science" - the CS program under the sciences, and one of the business tracks under the school of business. The school of business basically taught the students to use the foo function of the language de jour to do action bar. I helped a few people in my circle of influence from the business school wow their instructors (How's that so fast?) and classes by teaching them some of those differences. I also took on some projects speeding up code submitted by
other (Update: I was in CS, not Business) business students as projects for departments around campus.
My point is that even if the language's sort is the best for the purpose, it does not hurt to learn other methods, nor is it bad to know why it is the best for the purpose. Trying to implement it oneself can also give insight as to why the language's sort is the better choice.