I think there are species and areas where that's the case, like cougar in California or Woodcock here.
I don't believe it's a valid argument in most of the northeast with bear, cougar, eastern coyote and deer as these were virtually extirpated (or non-existent) 100 years ago.
I believe a lack of farming, clear cutting and hunting have created nearly ideal habitat in these communities for those animals and their populations have grown and spread dramatically.
I agree with what you are saying about 100 years ago. A lot of animal populations in this country were driven to near extinction and the bears are spreading again. However, by starting from further back, historically speaking, their habitat has been reduced by more than half.
If you go back 200-300 years, a little further, about the time the white man came, those bear populations were not far from from today's numbers. This was before industrial farms, clear cutting, and over hunting existed. The black bear population has come back but one of the big factors that is very different from the past is that the bears have lost of substantial amount of habitat. Where they once had the entire country to range (the equivalent of 49 states, not HI), they are now limited to less than half of that range, so they have become more concentrated.
Anecdotal evidence: people hiking the Appalachian Trail see more bear along the stretch in Jersey where the habitat has been narrowed as compared to Maine where there are far more black bears (and far more habitat as the most forested state in the country).
For comparison, there were somewhere on the order of 300,000 people in the US in 1700. There are now over 300,000,000. That's an increase from 300
thousand to 300
million. As humans are the single most invasive species on the planet, it is hard to separate other population's trends from the effects of our own. The bears seem to be coming back in spite of that.
I also agree with what you said that in general, people should be more worried about other things such as the flu, with all due respect to the family of the victim and not to minimize that tragic event.
It's a shame black bears don't eat woodchucks Chip. I've got one of my own to deal with.