Tall riders would definitely benefit from big wheels. But statistically only 4% of US men and a negligible percent of women, are 6’2” and taller. So the market for these is just too small. It will have the same fate as the 650c and 650b wheels, which were a great choice for shorter riders, but could not survive for long on the market.
In fact smaller wheels have a far bigger market than larger wheels. Everyone of us went through a stage of life when we were 5’ or under.