Stopping elective procedures during the lockdown in places without a surge was a mistake, one made because we didn’t have adequate testing or PPE, but has been a detriment to many people. If a lockdown were to occur again now, elective procedures Would continue provided hospitals weren’t experiencing a surge.
The more aggressive we are early, the more we learn, the more we can narrowly "target" lockdowns. Mass untargeted lockdowns are a measure of last resort, because you failed and got to that point.
Simple rules... for EXAMPLE, any county/region with over 20% positivity, should go on a pretty hard core lockdown, except for the truly essential services. Any county with a positivity rate of over 10-20% should be on a "full soft" lockdown of non-essential services. Any county with positivity of over 5%, should be on a restricted basis -- no large gathering, no indoor dining, no themeparks, no in-person schools. Between 1% and 5%... semi-normal with masking and social distancing, but you can start to operate in-person schools, etc.. Under 1%, you can start to relax masking and social distancing somewhat, as long as you're closely monitoring.