Again it comes to point of realism vs. fun.
I'm sure in wars in our past sandstorms have risen up and totally threw the balance towards one side, and stuff happens you just gotta play what is dealt to you. Sometimes things happen in games that are unfair, and sometimes it's frustrating. I know I'm not the only gamer who's had some freak occurance in a game that didn't allow me to progress or something and I had to go back to a previous saved game or something else and waste hours of my time, but I don't fault anyone for it or give up playing (unless it's a repeated disaster).
I'm sure you might get a little ticked if you are in a tournament and your knocked out first round cause a sandstorm decimates your army, but we are going to take the power in which random occurances can actually affect you and make sure that occurances like this are kept to a minimum.