Quite a few people have had issues trying to get a Lemmy instance setup, and in a lot of cases it seems to be an issue with the documentation missing something or not being super clear (not blaming the devs btw, they have a LOT on their plate these days).
With the influx of users that are going to be coming to Lemmy over the next while, being able to get new instances setup is going to be critical, so anything that could improve the installation documentation, the Docker and Ansible examples, etc., which in turn will also reduce the number of installation support requests the Lemmy devs get, would be a huge help.
And the more people who can fill in the “expected common knowledge” gap, the more people can learn the basics.
Common knowledge isn’t the information everyone knows, honestly far from it. Common knowledge is knowledge everyone could benefit from.