Wow. I thought it was standard practice to route aircraft AROUND severe weather?
It is. Flying through a thunderstorm results in this or worse. There is no valid reason to fly through a thunderstorm and it's accompanying hail, microbursts, heavy rain, etc. Of course there will always be those who, for whatever motivation, will continue to do so on occasion and then have to explain to the boss why they did it, if they are still alive.