Specifically, it is only going to be enabled for these editions of Google Workspace: Business Standard, Business Plus, Enterprise Standard, Enterprise Plus, Education Plus
It is *not* going to be enabled for: Google Workspace Essentials, Business Starter, Enterprise Essentials, Education Fundamentals, Teaching and Learning Upgrade, Education Standard, Frontline, Nonprofits, G Suite Basic and Business customers
Even for those business accounts where this feature is enabled, the Workspace Admin for that domain can turn these stylistic suggestions on or off. (And you can turn off the inclusive language suggestions, while leaving other suggestions, such as for "concise language" on or off. There is a certain amount of granularity as to which classes of stylistic suggestions are enabled or not.) And users can also turn it on or off for themselves, regardless of what your Workspace Admin has decided about the defaults.
So sorry for bursting your righteous outrage bubble, but the intent is to enable this for those companies that might want to nudge their employees towards using more professional style of language. And if you don't like that, you can always leave and go work for some other employer....