A quote from the article: "response to concerns that the new r/homeautomation mod team could overlook posts with dangerous misinformation, the anonymous Redditor pointed me to the subreddit's sidebar, which has a disclaimer about the dangers of electricity. However, the disclaimer is only visible on old Reddit. The mod doesn't know why."
That kinda sums it all up, right there.
If a mod can't be bothered to know why something only shows on old reddit, they shouldn't be a mod at all. It takes all of two minutes to find out why, and not much longer to fix.
It's fine to jump in and learn on the go. It isn't fine to jump in and not learn at all.