I find when it comes to health advice, generally government sources can't be trusted because there's too much special interests and money involved. You really have to do your own research.
[1] https://www.npr.org/sections/thetwo-way/2016/09/13/493739074...
https://www.nytimes.com/2011/06/03/business/03plate.html
It's amusing how outraged people were when Michelle Obama did her Let's Move campaign focused on eating healthy and exercise and now people are pretending it's all new.
(There was also a version before that, in 2005. The "MyPyramid." That one emphasized exercise by having a person walking up a revised version of the pyramid. Though it had a whole giant category for "milk," admittedly as a knock against it. I'll grant today's did a good job in de-emphasizing dairy compared to 2005 and 2011.)
It's the same people who got offended because Obama asked for spicy mustard because they thought that was too fancy, but still actively voted for the guy who actively plates everything with gold so as to maximize how tacky everything looks.
They've never been internally consistent and I'm not entirely convinced that they have any principles outside of "own the libs".