This is not necessarily true. There are a number of different “types” of sloppy, muddy etc. Running through through watery soup is a lot easier than running through a thick split pea soup.
The Derby was one of it not the wettest ever run. It had been raining for days leading up to the Preakness. Something like 4 inches of rain feel around the area over a couple of days. It rained hard all day. I didn’t walk the track but I would bet it was just a watery mix. Not “oatmeal” mud/slop.
Bravazo blew by Justify just after the finish line and galloped out strong. Justify pulled up quickly. If it had been the Derby distance Bravazo would have one by a length.