How good is your Leaf at hauling tools or around development/building sites? If you want to compare costs, compare capabilities. Your EV is also paying no RUC yet either.
The Government has just rejected ACC levies being segmented by vehicle safety data on the basis of equity; if you want people who buy petrol/diesel utes to subsidise people buying Teslas despite there being literally no electric utes an alternative then you're going to have to expect those costs to be passed on.
I totally agree the lack of EV utes is a big issue today. We also have no conversion industry to speak of that could bridge the gap.
I also agree it makes no sense to tax something when there is no alternative. Much better to invest in an alternative.
I'm leaving toward the government backing a local option, either new or converted. Otherwise we're all at the mercy of auto makers who are very deliberately not making EV utes and vans.
Van is easy. Done already. Ute implies load carrying, towing, and doing silly things with. Ute will be a giant leap.