So the question was “why do S&C coaches love this exercise”?
while it doesn’t have to be this one specifically, it’s still a great unilateral variation that serves several purposes. The main being correcting any asymmetries in the hips, knees (valgus), hip mobility, posterior chain, ankle strength/stability. In addition, athletes don’t run two legs at a time, they (or anyone) run one leg at a time. Put all of that together and it reduces the risk on injuries and helps to increase speed especially first step get offs and deceleration