No. B&H has a competitive advantage because of the volumes they sell (meaning they get better prices from the vendors in the first place), and lower overheads. They've very effective at what they do. Local (Australia) suppliers have lower volumes and higher overheads, but you do get local service and support more easily. Even paying Australian taxes (there are no tarrifs for importing the camera gear), and freight, and exchange rate, it's often (but not always) cheaper to purchase through B&H so long as it's a higher value item (lower value items the shipping kills it). That's a totally legit, 100% legal, taxes paid transaction. That has nothing to do with the US having lower tariffs or taxes than Australia (it doesn't). It has to do with comemrcial volumes.
Your entire premise of the rest of your comment is equally wrong.
Correct in theory but in practice the situation is more complex.
Camera companies drop prices in some countries to increase market share or to offload excess stock. Retail shops run specials to compete, and raise prices on items where there is little competition.
Here in New Zealand you would expect prices in a suburban camera store to be a lot higher than at B&H. Also, we pay 15% GST.
I looked up the Fuji X-H1 and after currency conversion a local store was actually a little cheaper than B&H, and a little dearer for a 5D MkIV. Not that much in it.
Go in with a nice smile and cash to save them the credit card fee and prices may drop further.
Not that this proves anything in particular, because nowadays stuff breaks down so easily I'll pay an extra 20% just so I have a bricks and mortar shop to return the goods to.