What it does mean is any deck builder playing with any color combination can find ways to reload their hands
Jhessian Thief Jhessian Thief and Jeskai Elder could reasonably swap places depending on what you prefer
Illustrated by Ilse Gort Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
This way everyone feels lucky and the world is a better place
The fact that The Fourth Doctor returned to the battlefield means its ability can trigger again, so you can use Sensei's Divining Top to draw a card and put it on top of your library, which starts the infinite combo for infinite card draw, infinite ETBs, infinite LTBs, infinite draw triggers, infinite storm triggers, and infinite Food Tokens
Most people know she is good but find it hard to fit her into decks over other things or don't appreciate the ways in which she is crippling for your opponent