Readers here probably aren't hunter gatherers in Africa though. If you live sedentary lifestyle with an abundance of food you may need to take a different approach to nutrition. Sure it would be ideal if we were all hyper athletes, but the reality is that probably isn't going to happen and I am not sure it's even better holistically.
The reason to do RCTs and establish causality isn't to generate excuses for a sugar diet, it's to head off bullshit alternatives that don't fix the problem but advertise like they do.
Almost no RCTs are done when it comes to diet. They are outrageously expensive to do for any length of time, and nobody will fund them. Don't expect to see definitive studies done within your lifetime.
What's your point? The article implied that sugar magically causes obesity and diabetes, all calories being equal, when the weight of the evidence supports neither assertion, and ironically implicates saturated fat as being worse, showing an ability to cause an increase in visceral fat and worsened insulin sensitivity (measured with oral glucose tolerance tests), even in weight-stable subjects.
> different approach to nutrition
The "different approach" HNers gravitate towards is eating bacon and butter (i.e., keto/low-carb) and denying all of the evidence linking these foods to CVD, probably because fat and sodium are so addictive, much more so than sugar: https://news.ycombinator.com/item?id=42028432