Its a weird concept but only makes sense if 1. the batter protecting can actually hit/legit threat and 2. the batter being protected has good plate discipline.
In this case, I am not really sure either is in play lol; Bo is hitting though, so who knows.
As seen in other lineups though (Trout and Judge), they are doing demonic things because of two players behind them that are threats. So hopefully (aside from getting more ABs), this also gives Vladdy more pitches to hit. He has to be willing to take a walk though and not trying to carry the team by himself every AB.