You said "show me where there is no defence built into VT"
I never made this claim
Therefore your question is nonsensical
Actually, this is what led to that exchange:
All styles include defense. Just because the primary aim is attack doesn't mean there's no defense. If you don't defend, then you ignore the incoming punch and let it hit where it may.
Complete misunderstanding of VT
You appear to be telling me defense is an unintentional side-effect, which is patently incorrect. I know this because if it were unintentional, it wouldn't work on a repeatable basis. The principle is that attacking movements include the defense in them, so there's normally no need for separate defense. Tell me how that is nonsense.