Maybe in your mind, but in the mind of most Canadians that's simply not the case. Dodge alone sold 51,513 Grand Caravans last year while Ford sold 3729 Expeditions.

As a matter of statement, the  large SUV sector which includes the Expedition, Suburban, Tahoe, Yukon, Sequoia, and Armada sold a whopping total of 15,823 units, so basically the whole segment only sold 1/3 of what Dodge sold in Minivan totals. And we haven't even gotten to Toyota and Honda Minivans. All total over 90,000 Minivans rolled off the dealer lots last year.

Many Minivans come with AWD so therefore have great traction and as far as ground clearance, most drivers could care less.  It's not a factor in the cities as demonstrated by the millions of cars with even less ground clearance that navigate the city streets every single day. 

You don't make sense, and frankly most Canadians seem to agree.