That sounds more like the fad Atkin's weight loss diet that said you could eat unlimited meat/fat/protein, but no carbs.
This new JFK Jr diet has something in common with the Paleo "cave man" diet, which at least makes some sense in the argument ("this is what our bodies have evolved to eat") if not the specifics. I'm not sure where the emphasis on milk/cheese and eggs comes from since this all modern, not hunter-gatherer, and largely unhealthy, and putting red-meat at the top (more cholesterol, together with the eggs), and whole grain at the bottom makes zero sense - a recipe for heart attacks and colon cancer.
https://www.cnbc.com/2026/01/07/rfk-jr-nutrition-guidelines-...
Dietary cholesterol does not affect blood serum cholesterol and recommendations to limit cholesterol intake were removed from AHA and ADA guidelines in 2011 and 2013 respectively... the fact that this "common knowledge" still persists is disappointing.
The Paleo diet is utter nonsense. Human gut biome and ability to process different foods evolves far far far faster than that. We are nothing like our paleo ancestors.
Eggs are very healthy. There's a lot of nutrients that are hard to get from other sources that eggs have in abundance. And it makes sense in just a common-sense sort of way -- if you're a chicken you want to surround your offspring with the best possible food you can as they grow.
With regards to dairy, it's more about a person's individual reaction to it. It's a similar argument with nutrient density (since milk is intended for growing offspring, obviously it's going to be very nutrient dense). The downside is potential inflammation or not having the enzymes to process it.
I would definitely not lump eggs and dairy as "bad" in any way though.
Also, the "cholesterol" thing is a very bad thing to focus on. Cholesterol is not bad! You need cholesterol. (What do you think cell membranes are partially composed of?
Whole grains are not as good as you think. Often, they're made from strains that are optimized for growing and robustness not nutrition. Also, unless you're exercising a lot you really don't need much in the way of carbs.