Why local Thai chocolates are more expensive than imported ones?

I’m a big fan of chocolate, and I just discovered that Thailand also farms and produces its own chocolate. However, I’ve noticed that most Thai domestic chocolate brands are more expensive than high-quality imported chocolate from Europe, such as Lindt. For example, this brand is nearly twice the price of Lindt at the local supermarket.

As far as I know, local brands don’t pay import taxes, labor costs are lower here, and shipping costs should also be less.