Are you even serious? We see assembly lines, production lines and transportation lines in factories that all resemble human designs. We see rotary systems that look like the ones we design.
Well that's not a stretch at all. Those two systems don't even
look similar from where I'm standing. What's more, we have good reason to believe that the flagellum
wasn't designed. Rather, that it evolved gradually over multiple stages, each offering an advantage to the host. We can also see this in the human eye, which
appears to be like a pinhole camera, and which we can very firmly establish evolved. So whatever mechanism you're using to detect design, it's not a very good one - it falls prey to false positives.
You don't think there is a purpose in living organisms systems, features, structures and functions?
Not in the sense you seem to be implying. You seem to be implying that there's some sort of purpose; that some designer created us to serve that purpose. I don't believe that, and I welcome you to try to demonstrate it. (Please don't classify this as apologetics; a great many Christians believe in a God who did not explicitly design life!)
We are intelligent agents and we recognize design from intelligent agents,
You keep making this assertion, but I cannot accept it for intelligent agents that aren't extant. I have
no idea how you would detect the design of something that designs in ways we don't know with goals we don't understand and with methods we cannot even examine. Please prove that we can recognize design without any foreknowledge of what the designer has produced. Please provide a robust,
objective methodology for establishing this.
Are you claiming art can only be done by human?
No, I'm claiming that as of right now, advanced metalworking on earth is the sole purview of humans. We know of no other process
anywhere that can do that, ergo it is reasonable to assume that any worked metal was made by humans (at least until we encounter an alien race or supernatural entity capable of doing so).
If a space alien happen to make a statue just like that how would it be different?
It would not be significantly different. However, without first establishing that such aliens exist and visit earth, it would be
highly extravagant to claim that they were responsible.
Also art and music does in fact serve a purpose.
This particular artwork? I'm not sure it serves more purpose than scrap metal, to be honest. But then again, this is the nice thing about purpose: we can
investigate, to find out why it was made. What ID advocates do is approach this exactly backwards. They don't ask the designer what the purpose is, they try to find out based on what it does, and this can backfire
spectacularly.
Notice you are using the exact same logic as ID is using. The only known cause of art is human thus the only known cause of digital code is an intelligence.
"Digital code"? Okay, first of all, DNA is not a
code in any meaningful sense. We impose a code onto it. What we have is a complex mess of biochemistry that can be read out as a sequence of letters. This does not mean it itself is a code in the sense of information theory. Unless you want to redefine code to somehow include DNA, in which case no, we have countless examples of a code coming into existence through non-intelligent means. Just ask the people who use the atomic structure of rocks to pass on information.
(Also, it's not "art" that I'm appealing to as a solely human endeavor, it's "metalworking", but that's a little beside the main point I want to make here.)