I would carry it one step further, Caz...or modify it thus:
If you're doing a practice but don't know why you're doing it, this is not even truly Buddhism-as-religion, because you have not understood, even conceptually, what you're "wasting your time on"....(though, I believe, it is likely that merely doing the practice creates a connection).
If you are doing a practice, and can explain "why" you're doing it, you likely have understood Buddhism-as-a-religion, especially if you can contextualize the practice in terms of a larger structure, purpose, meaning, etc.
If you have actualized the practice, to any degree, and ultimately, if you have brought the practice to fruition, you have "Buddhism-as-Dharma." It is highly likely that, until Enlightenment is attained, even those on the Bhumis have both Buddhism-as-a-religion and Buddhism as Dharma. But only those who have reached the limit, come to the end, can really "demonstrate" fully "Buddhism-as-Dharma."