Right, but if you get a garbage character AGAIN, you get to reroll AGAIN. I'm not saying that the math is exactly the same as Advantage, I'm saying that if one player gets to roll multiple times for their character, and another does not... it's not equal.
Look, I'm not trying to say that it is a super big deal or that anyone who plays that way is doing anything wrong. I played that way for decades. I just noticed the inequality (on multiple occasions, but one stood out as particularly uneven). So I don't do it that way anymore. Based on all the various ways people have shown that they roll (or don't roll) here, I can see that I am not alone.