I think that's oversimplifying it a bit. 1 on 1 defending is all about slowing the opponent down as it is incredibly easy to beat a defender who challenges you first. So you close the space as much as possible without offering him to go past you on either side easily and wait for pressing triggers (e. g. a bad touch). That's when players like Vinicius are pretty much "uncatchable" because he can outran everybody (except for Kyle Walker). Sancho instead dribbles at the defenders more cautiously, makes a few body feints, forcing them to reposition and waits for them to misplace a foot while doing so. That also gives team mates time to make runs inbehind or come towards him so even if you cover all spaces he could dribble into, he can still exploit a small passing lane with a quick flick pass.
Watch the scene at 0:40:
Sancho changed directions a couple of times without any risk of losing the ball, Molina adjusted but a very tight lane for a one two opened up and he overplayed four (!) Atletico players. At 1:05 he has the ball in a deep position and isn't attacked so he plays a line breaking pass for the goal, again overplaying four Atletico defender. However, it also shows how reliant he is on being surrounded with movement and players who he can link up with in tight areas. In contrast, a player like Rashford can work in isolation since he can always rely on his pace and core stability.