This elevation of products into their parent organizations makes no sense to me.

Gmail != Google

WorkMail != Amazon

Gmail is targeted at consumers and is engineered to suck up your data to pay for itself. WorkMail is targeted at businesses and is engineered to not piss off IT administrators and middle management.

That's fair, still if I put in the effort to migrate, I would rather not do it to another company whose business is selling eyeballs. Amazon's business (maybe not WorkMail? who knows) is to sell you a maximum of stuff on their marketplace, building a detailed profile of you to recommend you more stuff.

I could also pay for a Google Workspace and stay with Gmail.