I can't believe this is even open for debate. If your carbon frame gets dragged under a car, it's fucked.
It doesn't matter if it doesn't "look fucked" (fair enough you were getting a crash assessment done) it isn't a case of "having it looked at", the bike is unrideable.
Even if by some miracle it works fine, it will eventually, as a result of being DRAGGED UNDER A CAR, fail.
And Max worked at Evans and is an expert....