Secondary emails are dysfunctional in Support

We need to be able to select which email addresses to send customers emails (IE when they have more than one email address in their profile). We should be able to CC the same customer on both their addresses. In the event a customer emails us back, Support needs to be able to pivot between email address. It's confusing why these rather basic things require workarounds such as Webhooks or deleting email addresses to send email to a determinable address.