If you said that these things are generally true, but have exceptions to these rules, then I would be more likely to agree. But I detest the kind of absolute-ist, black-and -white thinking represented here.
For instance, while physics is really good at making practical predictions about the physical reality of things we can observe, it mostly fails to describe why things behave as they do. It keeps trying to describe the underlying reality of the universe, but it's likely that the true nature of it is so much stranger than we can imagine right now.
Or that calories in vs calories out is the only possible cause of obesity. I agree that for probably 99.9% of people this is true, but to say that it's impossible that hormonal imbalance or other biological causes are not possible is just plain stupid. I know that lots of people think they are exceptions who probably aren't, but some of them actually do have more complex issues at play.