IME, IMHO, they are not helpful because they just cover the same old met theory, which is almost impossible to use for anything practical because there is no website which can give you the data to "plug into" that understanding, so to speak.
That was my gripe with the JAA IR met also. Completely useless for understanding weather, I found.
What is needed is knowing how to directly use the various internet-sourced weather data to make practical go/no-go decisions. I am not aware of anybody doing that.