Be careful what you wish for...
I think there's a few reasons why this is unlikely.
First, cost. I have a friend who is an Aussie working overseas in an essential role. He's asked to come back to Australia for a couple of weeks before returning overseas. As part of his condition of exemption to leave again he (well, his employer) has to pay quarantine expenses. Between the two lots of quarantine (here and there) that's a hefty five figure sum. It's not simply the cost of two weeks in a hotel. There are a lot of additional expenses that are required to keep the quarantine process happening.
Second, capacity. Hotel-based quarantine only became possible when the number of inbound passengers fell below the capacity of the hotels to hold them for two weeks. The capacity to manage this sort of arrangement is limited by hotel capacity, not airline capacity. Which would mean very few flights anyway and airline schedules dictated by hotel capacity, not their own levels of demand. That capacity also needs to be managed for other programs, such as bringing back in international students or any business travel meeting the exemption requirements (as per my mate above). Govt is far more likely to prioritise those inbound who will be bringing money into the economy than those returning from leisure travel.
Third, impact on domestic tourism. The last thing the domestic tourism industry needs is the hotels to be full of people in quarantine. The more people in quarantine, the less rooms available for domestic or TransTasman tourists who are actually going to be out in the community spending money. This would mean a longer and slower domestic tourism recovery.