R0 depends both on behaviors that lead to infecting others and behaviors that lead to being infected. In the case of COVID-19 these are largely the same behaviors, with the difference being that you do one while being infected and the other while being vulnerable.
All else being equal, a person who has recently been exposed to other people is more likely to be infected than a person who has recently been in isolation, and a person who has been in isolation is more likely to be vulnerable to infection because they have a lower probability of being currently infected.
By coming out of isolation for less than the time it takes from infection to an infected person becoming infectious, and then isolating for longer than it takes for an infected person to be no longer infectious, we can separate out the time periods where a person is more likely to be infected and where they are more likely to be vulnerable to infection. This would allow us to make sure that the person has a low probability of being in contact with other people for a least one of these time periods.
Concentrating behaviors that increase the chance of being infected or infecting someone else -- for example contact with other people and interspacing it with periods where such behaviors are abstained from -- should lead to a lower R0 than spreading the same behaviors evenly over time.
If someone went out today, it is better to go out today again than to go out next week because even if the person has been infected today, it will not be infectious today, but it will be infectious next week.
This is an idea, where someone who doesn't know much about it tries to game a system. Usually there are more complexities involved than the person is aware of.