Why are DLC characters allowed in runs? It seems odd to me that you can pay extra to gain a competitive advantage when running

Hey so one of the fastest ways to play is to flag and click so you get all the tiles around it, what if there was a category where you couldn't do that and had to play without that 'multi click' or just without flags in general. I personally prefer doing it without flags and it would just add to the playstyle so this would be pretty nice