Are you suggesting that all possible intelligent designers not be considered? Thats as bad as not considering all conceivable Creators.
I'm not "suggesting" anything except that it's foolish to rule out something that we humans do on a regular basis; namely, use our intelligence to create living things with desired characteristics. Given that we do it all the time, why is it somehow "unscientific" to suggest that it may not be a process that's limited to Earth-bound humans?
The initial problem is in getting folks to acknowledge the obvious fact that intelligent designers are alive and working on planet Earth. Sometimes it's those obvious facts that are hardest to accept.....