Tee Emm, I agree in part. After takeoff, the only item that is critical is the pressurization, so why not have a 10,000 ft check challenge-response for that item only? By 10,000 ft the PF has the autopilot engaged, the aeroplane is probably on final departure track and so that is the time to have a good look around before starting the housekeeping.
Immediately after takeoff is no time to be distracting PF with non-essential challenge-response. So who cares if the gear or flaps are not up? It will fly like a dog, but it probably won't crash and most guys will only screw this bit up once or twice before the embarrassment factor kicks in so they never do it again.
But yes, the pressurization is a special case, but not at low level, please.