The risk is in what is missing.
An AI draft reads well. The problems are the clauses it did not write: the cap on liability, the IP assignment, the notice period, the bit that makes the deed a deed. Finding an absence takes longer than checking a presence.
An unknown document takes longer than a known one.
When we start from our own template we know every clause and why it is there. When we start from yours, we have to read all of it, and we are responsible for all of it.
So the price goes up, not down.
A review of a document we have never seen is a real piece of work. We have put a fixed price on it below, so nobody has to negotiate. But the template is cheaper, and usually better.