There’s a difference in kind between “you can drive to this plot of land the size of a smaller state but there are no roads in it” and “the only way to reach this land at all is via helicopter”.
The land owners in this case are even actually arguing that so much as waving your arm over their line violates their air space, so even a helecopter is no good. Which makes me wonder why I don't immediately go buy a $5000 plot somewhere and sue all the airlines for millions.
edit - ok actually a helecopter is good, see several other comments
edit - ok actually a helecopter is good, see several other comments