The roots of it have been traced to Thomas Aquinas who framed it thus
"Wherever complex design exists, there must have been a designer; nature is complex; therefore nature must have had an intelligent designer"
Aquinas' statement is clearly foolish; his first premise is unsupported. He was merely trying to justify his superstitions. As one would expect, much has been learned in the long period since he wrote.
Consider evolution as a counter-example. It is easy to see how the evolutionary algorithm would produce increasing complexity, since changes accumulate with time, and it does so without any intelligence being involved at all. Indeed, it is hard to see how that could be prevented from happening.
I wish we could free ourselves from the errors of these ancient so-called authorities. They muck up our thinking, especially among the gullible.