So I don't know anything about game dev stuff, but I feel like if this WAS a mistake they wouldn't have made a screen that explicitly said "REQUIRED"
https://arstechnica.com/gaming/2019/07/bethesda-working-to-remove-login-requirement-for-doom-re-releases/
Unless they mean "the type of 'mistake' that is only a 'mistake' to us because people called us out and not because we didn't mean for it to be there in the first place"