There's a functional workaround to send Group emails that takes some setup, and a copy-paste. But it's easier than any one-by-one solution cooked up without a 3rd-party app. Here's the way:
STEP ONE:
Go to Settings>General>Keyboard-->Shortcuts
Add a new Shortcut by typing in the full email addresses in the "Phrase" field, separated by comma and space; type in the few letters representing this "Phrase" in the "Shortcut" field.
STEP TWO:
In the email app, IN THE BODY OF THE EMAIL, type in the letters for the Shortcut and space. Then Highlight-->Copy this text and paste it into the To: Field. (Obviously: Delete this text in email body; and use CC: or BCC: fields as desired.)
Regrettably, you CANNOT just type the Shortcut in the address fields as it gets lobbed into one address.
This "No Group Email Functionality" rates a #FAIL by Apple. One of the few.