The 800m can be a tremendously entertaining event, when strong athletes contest it valiantly (see Rudisha, etc).
But, even as ultimately most of running success is genetically pre-determined, the 800m is truly just a game of natural ability. This is certainly true at the high school level, where even extremely talented kids might have to string together a couple weeks of real training to excel at 3200m, but many can just roll out of bed and run 1:55 if it's in them. But even by the professional level, with the success (well, only somewhat) of Murphy, Amos, 15 or 25 or 30 or whatever mpw Brazier, and so on, it's just not an event that compels respect from the point of view of anyone attached to a romantic conception of the loneliness of the long distance runner ...
The marathon is nice because even as running 2:10 or faster is of course first and foremost a question of talent, it becomes increasingly difficult to just waltz your way to 2:05, 2:15, even 2:25 without at least some serious commitment and dedication to training. The 800 as a rule seems at the other extreme, where really one needs to be able to run 1:50 off of 8mpw and basketball on sundays (and this is much further from the outrageous caricature it should be).