It's a death by a thousand cuts situation.

Everyone wants to blame existing landowners and sure they share part of it but the lion's share of the blame ought to be directed at do-gooders (land owning or otherwise) who are unwilling to be honest (with themselves, or in the internet comments) and admit that every policy that "looks good" based on the one sided statements presented in abstract by its peddlers.

Each one of those policies is part of the system that gets us the results we have and the peddlers all share in the blame.