It's not a difficult process, the problem is there is little incentive to get to make it 'correctly'. Good pizza for example costs significantly more to make and you can only afford to serve it if you customers are willing to pay for it.

PS: Chocolate seems to be the worst offender, IMO. Good chocolate is pricy and has a poor shelf life, but tastes so much better than even expencive chocolate you can find in the US. Even when you can find a good brand companies just tend to make worse product over time, because that's how you maximize profit.