As others have pointed out, there are some practical issues (people quarantining in groups that are hard to subdivide, and the rare but not nonexistent longer-than-14-day incubation being the obvious ones). But the generator of this is valid: strong virus-control measures concentrated into a short time work better than weaker measures over a longer period. Ie if you can do A, B, and C, each of which reduces R by 0.4, doing them all at once is much better than doing them one after another.
As others have pointed out, there are some practical issues (people quarantining in groups that are hard to subdivide, and the rare but not nonexistent longer-than-14-day incubation being the obvious ones). But the generator of this is valid: strong virus-control measures concentrated into a short time work better than weaker measures over a longer period. Ie if you can do A, B, and C, each of which reduces R by 0.4, doing them all at once is much better than doing them one after another.