Google Authenticator is merely a generic TOTP token storage app. The person you’re replying to was pointing out that Google Authenticator, specifically, isn’t necessary. There are alternatives, and unless you’re using a company-owned device that restricts the apps you can use there is no way for work to dictate which app you use for TOTP tokens.

Duo, Okta Verify, and other 2FA apps that use push notifications and such, are a different beast altogether.