What's So Wrong With Random Chance?

If creationists and Intelligent Design advocates don't think life could have happened by the action of so-called random chance, how do they think our bodies continue to function from one moment to the next? How do they think oxygen molecules find hemoglobin molecules to bind to, for example? Everything that goes on in a living body happens by random chance. If it happens that way now, why do they think it couldn't have happened that way from the start?

I don't mean this in a rhetorical way. I mean, do these people actually have an idea how to answer what I'm asking, or is it just that they haven't really thought it through?