Top pic is right when Mahomes drops back to his spot 7 yards deep. Pocket is clean for literally 1 second and if he stays put or steps up into the pocket, then he's taking a sack by Fisher's or Schwartz's man. Fishers guy pushed Fisher into the pocket collapsing it and Schwartz's guy is blowing by him. This isn't on Mahomes no matter how much Geoff wants to say it is. If Mahomes tries to step up and to the left of Fischer then the defender just disengages and gets the sack, so Mahomes does the only thing to give his receivers time to get open and that is to drop back and make his way towards the sideline where it's pretty much clean of defenders.
Geoff Schwartz is being a biased clown here and really making himself look like an ass arguing with guys on Twitter.