I highly recommend you learning it. I tried it a hundred times and didn't know how to do it. Once in a while I managed to do it, but I couldn't do more than two in a row. But at some point I finally learned to do it whenever I wanted to and it makes the game so much more flexible.
As I recall the mechanics were (roughly) similar in Fusion and Zero Mission. It's different than other games with wall jumping, especially compared to Mario for example.