End users don’t care to type in http:// let’s alone https:// too.
All they need to remember is pbx.domain.com and the server will auto redirect just like when you type in google.ca and it automatically goes to https://www.google.ca
I think the reason we are asking for FreePBX devs to add an option is that we may not want all http requests redirected to https. Provisioning of non-sangoma endpoints is only available over http but an admin may want to make UCP for end users selectively available over https.