Oh FFS plenty of government services do the exact same thing. The issue isn't private/public. It's our modern development culture of not looking for edge cases

Oh FFS plenty of government services do the exact same thing. The issue isn't private/public. It's our modern development culture of not looking for edge cases to begin with, and ignoring them when they arise later. My city uses Google to fill addresses on their tax portal, so for new construction this exact issue arises. My power company (a public utility) uses recaptcha for logins and I frequently struggle with it.