torquemada60,
First and foremost, storms and turbulence are a pain in the ass. We can't eat our lunch properly, it's difficult to drink our tea and the crossword becomes illegible. From this, you should see that turbulence is an inconvenience not a danger. So, from a totally selfish point of view, we will do everything within our power to stay clear of it!
As you will see in the video below, the aircraft we fly these days are built to withstand one hell of a beating. Aircraft manufacturers design their aircraft to deal with far more than the natural world can throw at them, so even when it looks like the wings are flapping like a bird in turbulence, they really can deal with a hell of a lot more.
YouTube - Boeing 777 Wing Load Test
Now, I know you're probably thinking 'Yeah, but what about that Air France?'... until the the results of the investigation are published, we will not know for certain, what the causeS (yes, there is always more than just 1 cause) are.
So, in the meantime, take comfort in the fact that we head off to work in these aircraft and weather conditions hundreds of times a year actually looking forward to going flying.
A colleague was once asked does he not get scared being a pilot. His response? "Yes. During the drive to work."