Interesting research and hypothesis:
The patterns of attacks reported here may also reflect an increasing number of bold individuals in large carnivore populations, as this trait is often correlated with aggressiveness13,14, and this might lead to more aggressive responses when large carnivores encounter humans. We hypothesise that intense and prolonged human-caused mortality imposes selection pressures on target populations (selective removal of certain phenotypes) and might lead to rapid evolutionary changes15. Natural selection maintains a mix of behavioural phenotypes in populations16, the shy-bold behavioural continuum17; bold individuals thrive on risk and novelty, whereas shy individuals shrink from the same situations18. Persecution, however, is expected to result in the disproportionate removal of bold individuals, as they are less cautious19, and thus more likely to be killed. As a consequence, shy individuals might have been overrepresented in remnant large carnivore populations in the past17,18,20,21,22. Additionally, individuals may become more vigilant and actively avoid contact with humans during times of intense persecution23. Although the history of large carnivore persecution and conservation differ across regions9, the contemporary conservation paradigm emerged during the 1960s–1970s24, when most bounty systems were banned25 and large carnivores were reclassified from vermins or bountied predators to game or protected species. Since then, although large carnivores have continued to be hunted or managed (Extended Data Fig. 3), most populations have generally increased during the past four decades9,11,12. Increasing population trends in conjunction with relaxed artificial selection may potentially engender higher variation in behavioural temperaments26, which is likely to alter individual responses to human encounters22. This significant increase of large carnivore populations in both North America and Europe, and their consequent range expansion, also may contribute to explain the observed increase in the attacks on humans.
Basically, they are saying if people shoot the individual predators in a species that are on the aggressive end of the behavior spectrum the species population as a whole will be better behaved toward humans. We have had relatively good behavior toward humans from these predators for many years because we selected for good behavior decades ago and then the selection process was banned. Because we stopped shooting them this may be responsible for the recent increase in predator attacks on people.
Basically, we can train bears to be nice by shooting the not so nice ones. I’m pretty sure this same strategy also works with two legged predators.
See also Bear spray, yes or no? for further examination of the issue.