Unless it was collared or tagged, how is anyone to know which lion it was? Because the black maned preserve lion went missing doesn't mean the dentist killed it. That lion was supposedly 13 years old, it had sired many, many offspring, some of whom might also have black manes.
Furthermore, one doesn't bait a specific lion any more than one chums a specific shark.
The Hwange National Park is enormous. Yellowstone, Yosemite, Grand Tetons, Redwood, Shenandoah and Crater Lake National Parks will fit inside it with room to spare. Think about it!
Someone was looking to make a political case and this Dentist is the unfortunate person fitting the target profile. The physical hunter became the politically hunted.
Sometimes, even on teh intarwebz, you can spot a hunter, or even someone with common sense, just from a single post. The urban fools who are the targets of this story can't even imagine the simple truth you elucidate: even if one lays out bait (which is illegal in most of North America, but not Africa) you can't expect a particular game animal to turn up, or stipulate the time or any other particulars.
Someone was looking to make a political case and this Dentist is the unfortunate person fitting the target profile. The physical hunter became the politically hunted.
Yup, this guy was set up, and to add insult to injury, no one cared who he was in particular, just that he could be used for their purposes. Baited, as it were.