To add to the above, there are plenty of places far worse than Malaga for turbulence. I am sure you know how busy Malaga is, but how many incidents have you read about where passengers were injured or even inconvenienced due to turbulence?
It's quite simply really. The Captain in charge of a multimillion pound aircraft does not want to be responsible for any damage to it, nor does he want his breakfast to end up in the seat of his pants or on the cockpit roof. They won't fly if the conditions are not safe and at least reasonably comfortable.
The wings on a modern large jet are designed to flex up to 8 metres from their normal position and about half of that downwards. I am sure someone with better knowledge than I have will be able to give more accurate information on this, but the danger that turbulence presents is minimal as long as the cabin is secure.