I may choose a distro that specifically looks a certain way - like the one that tries to look just like MacOS. That's a perfectly reasonable thing to want to do. Just as it's perfectly reasonable to regret consistency on a platform that doesn't have distros - as you may want to vary.

"However, if you change things like stylesheets and icons, you should be aware that you’re in unsupported territory."

Unsupported territory, for changing a desktop icon, or adding a higher or lower contrast stylesheet? Wow. That's pompous and absurd for me. Doesn't sound like it's explicitly made a reasonable exception though, just piles on a layer of entitlement for a damn brand.