"Where they are found there are Tigers, and always have been. They live in the same areas "near almost any body of water", the areas where people are there are lower populations of both. In Africa there are high concentrations of nile monitors near human settlements.
Either way these populations have been high since before people were in either place.
The point is they survive in plain view of large mammalian carnivores in almost every environment because they can, they can defend themselves and live in the same niche as those mammals"
1. tigers and monitors are not competing for the same niche. Monitors compete with much smaller mammalian carnivores, like such as small cats, civets, etc.
2. the one monitor that may even come close to the same niche as a tiger (but not quite) is the Komodo dragon. Ever wonder why its distribution is limited? Check out the distribution of tigers on Komodo, Rinca, Flores etc. Woops, none there!
3. how would you know what the populations of Niles vs small mammalian predators were in specific spots in Africa now, nevermind before humans arrived? Looking at a range map in a book doesn't tell you what's happening in smaller areas, where there may not be as much overlap as there appears.
4. in areas where the monitors coexist with small mammalian predators, or even large mammalian predators, it has nothing to do with their ability to tail whip or win a fight. It has to do with niche separation.
No. 4 is what this discussion was all about in the first place. Arguing about whether or not a monitor could win a fight with a dog lead you to talking about the survival of monitors in different areas. I maintain that survival of monitors in the wild has little to do with the ability to win a fight or tail whip predatory mammals, but the ability for them to find a niche.