You are clear, and you are wrong. In the case of cars, we have evidence of their purposeful design. We can actually know the designers and observe the process. So the "hypothesis" of ID for cars is a slam-dunk no-brainer. It's fact. But there is zero evidence for ID in the domain of biology (except for those recent occasions when we ourselves go around transplanting genes). Now then, a scientific theory must be based on observable evidence. If there is none, it isn't a theory, it's mere conjecture. Which is why I said that evolution is the only [scientific] game in town.
And yet we see evidence of Intelligent Design when we look at a junkyard filled with buried cars. We can also observe the evidence of intelligent design when we watch Man program DNA via gene-splicing.
In contrast, when we look at the fossil record, we can't tell if speciations were caused naturally (ala Evolution) or by un-natural processes (ala Intelligent Design).
With such admitted evidence in hand, clearly there is more than "one game in town" to explain the origin of Life.