You’re not missing anything really. For some reason some people like to say that Mint is a good distro for beginners and imply that you should change away from it when you’re more “advanced”. This is really nonsense. Mint is a good distro. I switched to Tumbleweed because I found one or two things I couldn’t do so easily in Mint, but if you’re not having trouble there’s really no reason to switch. And with tools like Flatpak and Distrobox available these days there’s even less reason to distro hop.