Hmmmm....must be an late night oversight. This is crucial for individual and group registrations and there is no field identifier for PAID (or FREE) Events for Individuals that will provide yes/no for email address.
Email address appears as an option for Groups but not PAID and FREE registrations.
Sorry, but we need an update to add this field. More important than the Organization Name, in my opinion.
No, this is just an oversight on your part. The individual registrations will always have First Name, Last Name and Email. You can't disable any of those three which is why you don't see them in the list of fields to show/hide or mark as required. No bug or missing field here