It’s the most popular instance with questionable politics and moderation and this move pushes people to other instances before they even discover deeper issues there. Most instances have zero issues with VPNs, and it doesn’t even matter what is the parent instance of community you’re posting to. Which means you can post the same stuff into the same place from almost any other instance using VPN.
Yep, maybe it would benefit from more advertisement but I decided to not recommend it until I experience it for some time. It took me a week or two to realize that I don’t like moderation at lemmy-world for example, I would definitely recommend choosing other instances, and then, it takes time to figure out which ones are worth recommending. Some are extremist far-left/far-right, some are at risk of shutting down if admin gets bored and decides to stop paying for hosting from his personal money.