You haven't controlled for body weight changes though. Nobody doubts that diets (if adhered to) can reduce weight. So if biomarkers improve relative to an alternative diet, the question is it because A) the Med diet is more effective at weight loss, or B) the Med diet has benefits outside weight loss. The research you linked is interesting, but confounded by weight loss. Research that has directly tried to control for this has generally found that the health benefits of the Med diet are mostly or wholly attributable to the mediating impact of weight/fat loss.[1]

This is a critical question, because GLP-1 agonists like semaglutide are far more effective at weight loss (with much lower dropout rates) than any diet known to mankind. So if the benefit of the Med diet is mediated by weight loss, who cares in the age of GLP-1 agonists? It's like arguing about the fastest hot air balloon after the invention of the jet engine.

[1]https://www.semanticscholar.org/paper/Obesity-Mediates-the-A...