It feels like they’re trying to be a sort of “wikipedia” of every programming problem and solution.

That is exactly what stackoverflow is supposed to be. It’s not there to answer your question about “why is my IF statement not working”, it’s there to be a resource for all developper. How is a question about your specific problem gonna helps anyone ? If you haven’t, take the time to read the “how to ask” section, it describes what kind of questions are acceptable and what kind are not.

There is, obviously, some proper questions that should not have been deleted, but most of them are not suited for the site, as they don’t bring anything to other developers.