Wikipedia in particular isn’t the problem here, it’s citing encyclopedias as sources (or any tertiary source in general)

Most teachers before college tend to ask for citation as “where did you find that information” to judge your work based on the reliability / their opinion of the reliability of those sources / their opinion of the “quality” of your research process. Which is understandable in the context of grading papers, but that gives the wrong idea to students about why citing sources is necessary.

In practice, citations are about information traceability and verifiability rather than some nebulous and often subjective “reliability” or “accuracy”.

Knowing that you found some information on some website is useless. What’s interesting is who originally came up with that information, how and why. From there, one can judge whether that information can be trusted. And trust in sources evolves with time, articles may get disproven or discredited, so it’s important to link to original sources rather than just saying “the editors of some encyclopedia said it was true at some point / found sources that they assumed were good at the time”

The issue is not that Wikipedia is wrong, unreliable, superficial or not worth citing, the issue is Wikipedia is not a source.

Contrary to what schools teach for some reason, the ultimate goal of citing sources it to tell where the information comes from, not where one found it. By nature, Wikipedia or any other encyclopedia doesn’t create or analyse information, it just compiles it. No information can originate from Wikipedia, so Wikipedia is never the source of anything. The primary and secondary sources at the bottom of the page are.