It’s not specifically unhealthy, diets here exist of a lot of bread and meat, veggies and potatoes for diner. It’s more that Dutch cuisine really isn’t spectacular, Seven lives in Belgium and they’ll naturally have more France influences in their kitchen. I don’t understand why he’s pointing to obese here, he’ll have to clarify that
I always tell the same to my family in Italy; an average Italian family (especially in the south) will basically always eat Italian. If you look to an average Dutch family they’ll eat Italian, Chinese, some Caribbean and Indonesian food along with Dutch food over the course of a few weeks. That already shows the differences.