This is the SO core model: everyone on SO thinks “if I just down/close vote this and move on, I haven’t wasted much of my time and now the bad content will go away”. The are multiple fundamental flaws with that reasoning and SO is also per design built to ensure that tons of time is spent with every bad post.
First of all, this doesn’t necessarily provide meaningful feedback to the OP about why their post was down-voted into oblivion. Elitist reasoning or not, yeah the domain expert is (arguably) more valuable to the site than the clueless newbie. But if the clueless newbie remains clueless, it often means that they keep on asking bad questions. The down/close vote removed the symptoms not the cause.
It might also mean backlash in the form of the OP getting frustrated or angry, which they can express either in non-polite forms, meaning more moderator work. Or they start some meta discussion where they constructively ask what’s wrong, in which case someone has to teach them how to use the site - which is a good thing, but again goes against “veterans wasting time”.
Instead of going through the whole draining process of bad post → providing feedback - > providing moderator efforts → new action from OP → someone teaching OP, why couldn’t we have skipped all of this and went straight to “someone teaching the OP” before they even posted on the site? Less effort for everyone, and whoever is using the site for what the site is actually meant for don’t even need to get involved. And lets not even mention all of the extra pointless busy-work the above process creates in the form of close-vote queues, flag queues, edit reviews.
If stopping bad posts from ever hitting the site isn’t possible, then the second worst option is to remove them as swiftly as possible. Then hopefully someone can pick it up from there and give feedback to the OP. What’s very harmful is the SO model of “remove bad posts as slowly as possible”. 5 close votes, multiple down votes, public shaming, public screaming in comment fields… and the post is still not removed, because you also need 3 delete votes or some Roomba script that only kicks in when lots of time has passed. It’s a design for maximum drama and frustration for everyone involved.
If 1 single trusted user could just delete the post completely from the site with one click, none of this drama would happen. How to provide feedback to the OP from there is another story, but if it needs to be done by humans, then it should be done by someone who is patient & willing to do so. Not by people who are deadly tired of seeing bad posts popping up & just want to use the site as intended.
One root of all the flaws in the SO model is the “crap hugging”, where everything ever posted on the site is regarded as an invaluable resource to mankind. SO must dissect, evaluate & refine the crap in endless edit & review queues, until the result is shining, polished… crap. Since the contents of the post were not valuable to begin with and it could just have been swiftly deleted with one click.
Down votes should be used for moderating content on posts that are otherwise fine and on-topic, not as some “close-vote lite”. Close votes/closed state should mean that the post goes to a state where it is no longer visible save for the OP and those moderating the post. And there’s no need for consensus - either we trust someone to close posts or we don’t.
The SO model with “we trust you a little bit” is harmful since it leads to “remove bad posts as slowly as possible”. Whereas the “dupe hammer” or moderator deletion carried out by one single user work much better. When I “dupe hammer” something swiftly after it gets posted at SO, even before anyone posts an answer, there’s almost never any follow-up drama. Such posts tend to just sit there, zero comments, zero votes, until the Roomba bot eventually deletes it.