[zerkten]

Both of those are much more "free form". You have to put effort in to get some value out. That's before you think of culture, and for it to be the norm for people to use those tools. SO has structure for Q&A which solves the technical issue, but it still doesn't solve the cultural aspect.

Does pestering being "easier" reflect a deeper problem? Maybe, maybe not, but in a lot of places people get annoyed having to answer the same question over and over. Committing answers to writing also helps clarify them and avoids someone walking off with institutional knowledge. In theory, that improves things.