This analogy doesn't necessarily work since metronomes in a car would have to be fixed to the car and even then there's a huge difference with resonance in a wrist watch.
The effect of your wrist moving doesn't impact the vibrations of the oscillators in the same way and at the same intensity.
One more thing to consider: metronomes are just coupled pendulums, while balance wheels are circular, their oscillations are affected by external forces in different ways.