claim that you can't get for the design to the designer.
That is an unsupported assertion. With SETI, it is simply out of the bounds of our current technological capabilities to get from the design to the designer. They do NOT proclaim it out of bounds by fiat like ID does.
You are the one who drew the comparison, it is up to you to support it with more than just your say so.
If a nation expects to be ignorant and free, in a state of civilization, it expects what never was and never will be. --Thomas Jefferson