Well, not necessarily carbs, but insulin. You can get an insulin boost by gorging on steak too. And I believe that periodically raised insulin is indeed healthy - if not for muscle growth, then for sodium retention by the kidneys. But that does not mean you carbs in your diet. Carnivore with big, less frequent meals seems to be optimal, species-specific way of eating for human. You eat meat, get out of ketosis for a while and then you're back again.

As an aside, have a look at this paper about human trophic level: https://onlinelibrary.wiley.com/doi/full/10.1002/ajpa.24247

Sounds like something that might interest you.