Zing is a longterm game I'd say (pun intended), while professions will most likely be the first to introduce burning of zing it won't be the last. It'll definitely be interesting to see later when things have fallen into place how much of the daily zing generated gets burned but we want it to be a healthy mix of being able to earn and burn zing so players don't have to force themselves to buy zing in order to progress with certain activities in the game, we'll leave the "forced" buying and burning to some other future plans instead.
I respect and appreciate the thought you have and continue to put into this!