That isn't what was said though.
You are drawing a false equivalence between "someone was in front, so it was easier to go the same direction" with "someone else told me exactly what to do and what to be and I was simply a witness to it".
That's you creating the thing you're claiming is there.
Why is what I actually described bad?
Because your description in that post was itself a False Equivalence, because that's not how the term "Leader" was being used. You were trying to change what "Leader" meant, so I ignored that attempt and actually responded to "Leader" as it was being used in the discussion.
Person 1: "It's horrible to be left behind by the party."
Person 2: "Being left behind isn't that bad, because you can just track the party and rejoin it later."
Person 1: " Being left behind is abandonment and that doesn't feel good."
You: "Maybe the party just went left at the intersection. Why is that bad?"
Me: "It's bad because being abandoned is emotionally harmful."
You: "False Equivalence! That's not what I said."
In 4e leaders direct others, pushing and pulling them, as well as giving other bonuses that represent the other PC doing as the leader directs.
Commander's Strike: "With a should,
you command an ally to attack."
Furious Smash: "You slam your shield into your enemy, bash him with your weapon’s haft, or drive your shoulder into his gut. Your attack doesn’t do much damage—
but your anger inspires your ally to match your ferocity."
Wolf Pack Tactics: "Step by step,
you and your friends surround the enemy."
And on and on.
These are all examples of the leader directing the play of others. In some cases it can be ignored. In others the other PC has no choice but to do as the leader wishes.