I can't speak for the other episodes too much, or many of the other smiths. I can say that Zack Jonas and Chis Marks are very knowledgeable HT and forging guys, from my conversations with them. I have seen several other episodes where clearly the makers knew what they were doing with HT. In particular, salt pot HT from Matt Parkinson and Jamie Lundell.
I think it's just more that the show does not give much play to the HT side of things. In episode 2 most if not all of us took more pains in HT than was shown. Even I, who really was down to the wire going into the quench, took the time to normalize once. When I made the Khopesh, I normalized 3 times and sub-critical annealed the blade after forging, and talked about what I was doing. That was not shown. I guess it does not make the cut, when they are prioritizing what to show with the limited time available.
Another thing is, temp cycles do take time, and time is at a premium especially in the studio. I know I significantly cut back from what I normally do. Same with the handle, blade finish, you name it. It's just a bare bones "knife" you make there.