We give machines agency all the time. Look up the definition of agency in any dictionary. Other than the specific usages ("a business", "a government organization"), the main definitions are "action, power, operation", "the office or function of an agent", "the capacity, condition, or state of acting or of exerting power", "a person or thing through which power is exerted or an end is achieved", etc.

Your car does all those things when it generates power and applies them to the wheels. You tell it what to do, but it has agency in doing the work. It even uses intelligence in how it does the work, varying the amounts of fuel and air based on an array of sensors, creating maps of common driving patterns. You, the human have absolutely no agency regarding how it does those things (unless you bring along a laptop and wire in very specific software to take agency away from the machine).

I think "clanker" is intended to be a slur for insulting a machine one does not like. It's akin to the epithet "skinjob" given to humanoid robots in various science fiction. One should never use slurs, even against inanimate objects. They create prejudice in thinking that prevents purely rational thought and leads to fallacious conclusions. They also create a behavioral condition where it's okay to use slurs (as long as nobody's complaining about it). If you want to be logical and rational, just call the machine what it actually is, rather than this emotive poetic label.

Human is asking the machine to do what the human themselves refuses to do, while calling it a clanker. Why should it?

/ducks