In my experience carpenter ants will eat through dead/inner layers of oaks. Specifically live oak trees. Personal example, I have a 250+ yo live oak. When pruning this past winter, saw the inner layers eaten through by carpenter ants. The tree is healthy. Hopefully this info is helpful.
“Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Sufficient for the day is its own trouble."
-Matthew 6:34