Muscle actually is an intervention for one of the biggest risk factors in metabolic syndrome - insulin resistance.
Muscles use glycogen. They use more glycogen when you're doing the sort of thing that builds muscle, so of course it's even better there, but someone who just genetically puts on more muscle at the same level of activity as someone who puts on less will still use more blood sugar for their muscles, and thus be less likely to increase their insulin resistance.
There's a significant number of posts in this larger thread saying that it is basically just the benefits of exercise that is providing the positive health outcome and not just having the muscle, and I interpreted intervention in a broader manner based on that context.
My point is simply that muscle in and of itself has positive benefits, even if you didn't need to do another healthy activity to maintain or gain it.
Muscles use glycogen. They use more glycogen when you're doing the sort of thing that builds muscle, so of course it's even better there, but someone who just genetically puts on more muscle at the same level of activity as someone who puts on less will still use more blood sugar for their muscles, and thus be less likely to increase their insulin resistance.