This feels more like a proposal for whatever emoji-picker you're using than for Unicode - I don't use most of the scripts defined by Unicode, and I don't use most of the emoji either. No one is forcing me to use every Unicode codepoint.

Them being defined is only a benefit to me if I do happen to need to use them, say to copy-paste Sanskrit to translate it, or if I want to make a joke about bigfoot with an emoji punchline.