People are conflating "highly vulnerable" (shielded) with "vulnerable"
The highly vulnerable group are about 1.5 million people, currently shielded.
The vulnerable are between 17 and 25 million and are the ones at highest risk of dying - the elderly, obese, chronic health conditions, men, BAME
Who are you proposing to be protected op? The vulnerable as you have said (so upward of 17 million people) or the shielded?
Your op doesn't make much sense really.