Obesity is rising in Silicon Valley 11 years ago
You could also do something more reasonable like avoiding processed carbs and sugar as much as possible. I'm not knocking keto since I've never done it but I found a common sense diet that is sustainable is the best diet. Kudos to those who can go keto for their entire lives. I certainly can't. But that doesn't mean I can't be healthy.
Ultimately being healthy isn't rocket science and doesn't require some esoteric diet. Don't eat shitty food. Move/exercise more. And lift heavy things if you want to get stronger.