My use of "today" wasn't to compare to it to ye olden days of TBD and Teddy Roosevelt-style safaris, it was to emphasize that, at least today in the West, people are not hunting because they
have to. I have family who are bowhunters, so I'm familiar with the lifestyle. They enjoy the sport of it.
Plenty of people still go big-game trophy hunting, and that's what the episode was mocking anyway, so I don't know why you're hanging on it being less "common".
There are a handful of reasons why culling of certain animal population can be necessary, some of which you've cited, but that is not most hunting and besides: that's not why you're hunting. You're hunting because you enjoy killing things, and I find that pretty gross man.
hunters are NOT retards who throw their guns around being stupid
This is just as much of a generalization as what was on "Volcano", and much less funny. I know plenty of hunters who are retards. In fact, while many practice good gun safety, most of the hunters I know are retards.