It's a recurring (imo meaningless) argument people have made about literally every Planeswalker ever printed because its true about the Planeswalker card type in general because the rules let you attack into them.
If you do nothing on Turns 1-3 and then cast Elspeth, Knight-Errant, you probably will lose most of those games because you did nothing for 3 turns. The only PW where that statement isn't true is Jace, the Mind Sculptor, because Jace, the Mind Sculptor is busted beyond belief.
Jace the Mind Sculptor goes to 2 in the same situation after using his minus 1 and they get also will get their guy back. And yes, I'm well aware that isn't a good argument against JTMS.