Earlier quoted context omitted.
I think that will result in 10000 questions asking how do I add an entry to a vector. There are a lot of dear internet do my thinking for me, and no way those people are thinking or researching before posting
If there are people who need an answer, and people happy to provide that answer (and perhaps a bit of kind coaching on how to find answers in the future), what is the downside of letting them connect on stackoverflow? Nothing is forcing people to hang out in the novice area answering repetitive questions if they don’t want to. The downside of disallowing ‘unworthy’ questions is that people feel made stupid for asking…
Turnover/churn. If a Q/A site allowed basic questions then the site would be flooded with them since the population of novices greatly exceeds sophomores or experts. Moderation would need to keep up with silo-ing these Qs into the 'novice area' you propose. Experts would need to sift more to get to the interesting, challenging or novel Qs if moderation can't keep up, which might affect the retention of these users, thus diminishing the resource pool available on the site.
To me it's clear that tact and grace is called for, and is currently mostly missing, when directing askers of basic Qs to existing answers, whether on- or off-site but there is such a thing as tragedy of the commons. Some stewardship and curation is required to maintain an acceptable SNR.