For now, the phone is used to receive login notifications and such, which is also important
Is it? As long as I remember, I have never received any login notification through phone since I verified my phone number years ago. Or maybe I forget about it since I have lost my phone number long time ago.
My bad, , in reality I don't remember if it was me who settled it as is!
In reality in the settings, you can configure, activate or deactivate either the OTP checks or the notifications, you can choose for each action for the phone or for the email what you prefer!