Why are laptop chargers so damn fragile?

We all know that companies don't like to spend money. My theory is that they make them fragile while issuing safety instructions. So, if it breaks, they say that you had to follow the instructions. It is also another way to get you to purchase more and more chargers, because while you are out buying them, you pick one up and then- "OOH WIFI BOOSTER!" and you are shown other products. Also, they have transformers in them (which are the reason chargers grow warm), which deal with AC and DC, and manage voltage and current. Transformers are dangerous as hell to break, as they might actually explode. So I'm guessing the transformer they use is fragile but safe. In case you didn't know, its in the big box part of the charger.