There are countless refutations of the Watchmaker argument but I like this one in particular:
A beautiful snowflake. People have looked at this and marvelled at its symmetry. How can a water molecule in one arm know what is happening at the other side of the snowflake? What kind of long range information exchange is coordinating the freezing molecules to create such order? Again, it MUST have outside help, all part of a plan.
Our ignorance about complex natural processes led us to the conclusion that they must have been designed. But now we know that simply isn't true. The people in the past who though it was designed can be given a pass, but those people today who still think that, when the information is so readily available, cannot be excused for such blatant wilful ignorance.
We KNOW full well how amazing complexity and order can arise from simple local interactions (and no, sigh, the 2nd law of thermodynamics does not forbid it). It is not a mystery any more, it is a well-known fact. Paley didn't know that, but now we do.