Versatility. Whether it’s an NBA defense that wants its players to guard all five positions, or a soccer team that wants players who can seamlessly transition between offense, midfield, and defense, or whether it’s a player like Shohei Ohtani in baseball who can both pitch and hit for power. Versatility is the name of the game in pretty much every major sport.
In football we of course see it all the time. We see it with offensive linemen who can play tackle and guard, tight ends who can play h-back and fullback, or running backs who can split out wide and play as well as or better than some receivers.