Yes, that's right. Because I tried to explain you that updates help to keep the compatibility between the watch face and the watch software, so watch faces don't break. If you don't update the watch face, it's more probable that the watch face breaks with the time a new software release is published.
Anyway, there is a visible toggle button in Garmin IQ to disable auto update, is in 'My device' menu. Turn it off and you can update manually. You need to find the same option in Garmin express.