> Gnome is a DE designed to be used by distributions.
>
> Gnome doesn’t have an opinion on a desktop application launcher because it expects the distribution to add it.
I mean the official position has always been reasonable, if disappointing. GNOME never had any official support for themes, it was just a concept invented by users who patched the CSS. It's OSS so you can obviously do what you want but they aren't going to support it and reserve the right to make changes that break your themes.
I'm not arguing against their position. Rather, I'm citing their position on theming to argue that it would feel inconsistent for them to hold that position on theming, but then also have a position of encouraging downstream distros to customize the whole UI/UX of the DE.