Well, yeah, it's an assumption based on faith, IMO. If you distill it down, all questions about appearance of design takes no one closer to how something has that appearance on its face. Watches on the beach, any pebble, sand, water, humans, trees, stars ... whatever someone is observing, they anthropomorphize 'designer' behind its mere appearance.
"The first principle is that you must not fool yourself — and you are the easiest person to fool." - Richard P. Feynman
