It is more effective to follow these three simple measures:
1. Symptomatic cases stay at home for 7 days
2. All household members of symptomatic cases stay at home for 14 days
3. Social distancing for the over 70 population only
https://www.imperial.ac.uk/media/imperial-college/medicine/s...
Social distancing of the entire population also slows the acquisition of immunity with zero and low risk age groups, which drags the whole situation out months longer.
It might even be logical with the above 3 steps in place for zero/low risk group to deliberately seek out the virus. This grants immunity quicker, and if they become sick, they can receive treatment whilst hospitals are still underwhelmed.
Speaking personally I would happily accept a strain of the virus considered to be low risk, then go into 14 day quarantine, if it meant I could afterwards work and socialise without any lockdown or restriction.