Yes. If it takes me longer to figure out how to use your library or framework than to just implement the functionality myself, there is no point in using the library.
Some people claim you should still use the 3rd party solution because of the cost of supporting the extra code you have written. But bugs can exist in both my code and the 3rd party code and I understand how to fix bugs in my code much more easily.
It is actually counter-productive for doctors to learn too much about rare diseases.
When a patient presents with a set of symptoms, the doctor has to decide whether the patient has a boring common disease or the cool disease which is 100 times rarer. Human beings can't make good judgements about probabilities like that. If every doctor were trained to recognize a rare auto-immune disease that looks just like the flu, plenty of flu sufferers would be misdiagnosed. Far better to teach doctors the treat for flu and refer the cases that don't respond to a specialist.
It is a common problem with doctors fresh out of med school. Common enough that most doctors are taught to "not look for zebras when horses are more likely." If you spend enough time in a hospital you will hear veteran doctors dismiss interns and residents saying, "she's just looking for zebras."
Some people claim you should still use the 3rd party solution because of the cost of supporting the extra code you have written. But bugs can exist in both my code and the 3rd party code and I understand how to fix bugs in my code much more easily.