Agree, would be awesome to work stryde into it.
But conversely, I would say for the most part people are going to be doing the majority of their running in similar conditions to the rest of their training. For instance, there are typically not a lot of choices around my home so I end up running the same route often. Additionally, the program I followed did have a calcultor associated with it so you could determine how much heat and humidity impacts your pace. The pace given was ideal but add your temp and humidity and find out what pace to actually run at. I live in Saudi Arabia on the coast. Running in 100 deg temps with 85% humidity is a bit of a limiter!!!