Kale became extremely popular over the last decade due to a combination of factors. There's no denying that kale is a nutrient-dense food; it's rich in vitamins A, C, and K, fiber, and other essential minerals, all with very few calories.

The popularity of kale can be partly attributed to marketing and public relations efforts. In the early 2010s, Oberon Sinclair, a public relations professional, spearheaded an effort to promote kale. She formed the "American Kale Association" and used her connections in the food industry to help elevate kale's status. Celebrity chefs and wellness influencers started incorporating it into their recipes, which helped boost its profile.

The rise of the "clean eating" and wellness movements, along with a broader interest in superfoods, also played a significant role in kale's popularity. People were looking for foods that could provide maximum nutritional benefits, and kale was a good fit.

However, some people do consider kale to be overrated. While it is undeniably nutritious, the idea that it's the "best" or "most important" vegetable to eat is misleading. Many other vegetables are similarly nutrient-dense. For instance, spinach, broccoli, and collard greens all have similar or even higher levels of certain nutrients compared to kale.

Moreover, the emphasis on kale (or any single food) can sometimes overshadow the most important aspect of a healthy diet, which is variety. Eating a wide range of fruits, vegetables, whole grains, lean proteins, and healthy fats is typically more beneficial than focusing on a single "superfood." The healthiest diet is one that provides a diverse array of nutrients, which can't be achieved by relying too heavily on one particular food.

In conclusion, while there's nothing wrong with eating kale and it's a very healthy food, its status as a trend or a fad has likely been amplified by clever marketing and the wellness industry. As always, it's a good idea to eat a varied diet that includes many different types of fruits and vegetables.