As a moderator on Stack Overflow's meta site, I agree with this proposal.
Users come to us with their support issues, and due to the reasons why people downvote:
- posts that are a little salty (wouldn't you be salty if your question was just closed and you didn't understand why and no one waswere there to help?)
- posts they disagree with
- posts they feel don't 'show enough effort'
We're losing support requests to the blackhole of downvotes on meta.
If Stack Overflow wants to be more welcoming, that does mean having an avenue for people to get their questions about how Stack Overflow works answered -- and that can't happen if those posts are being downvoted out of sight. I can point to at least 5 different occasions recently where due to downvotes I had to find the questions through other means (seeing the Meta Comment archive on chat, for example).