It is not really about “tasting” human flesh once. Some people think that’s the root cause as a problem tiger kills and eats 1 human meal and then follows it up with others. But what that merely means is that it has turned "man-eater". Not that tasting of the flesh once necessarily had anything to do with it.
If a tiger wanted to taste human meat, it would’ve done so at first opportunity because humans are one of the slowest animals and quite accessible. They don’t see us as food, naturally. That’s the reason it doesn’t generally happen.
It has been proven by virtue of many natural occurrences that tigers don’t prefer human meat, even if given a natural opportunity. Even by means of some weird experiments. But at select times, when a tiger has some unbearable injury or is so senile / old that it essentially can’t hunt anything else. That is when there is a chance it may kill humans to eat to survive. Most of the times, even that doesn’t happen and a tiger dies of starvation despite all its struggles.
If you count overall cases of tiger attacks, you will find more cases of tiger attacking humans in self defense / reaction to provocation and then leaving the body or nibbling a bit here and there and then leaving it than properly eating it fully. That is because they don’t prefer the meat. Clearly, their body needs are much more meat, not the meagre amount a human would provide. They kill buffaloes, bison, deer etc. That is their idea of a proper meal. So, they have no logical reason to leave human body behind after killing it. Their body will need way more meat than a human body would provide. Even if they were to feast on a whole human body, it would need more.
If there are attacks on humans by 5 different tigers and may be 4 killed humans by accident / provocation / self defense and then didn’t eat the body and 1 tiger who has truly turned "man-eater" may have killed and eaten 10. Blame will still fall on the tiger in general. Even though it is 1 problem tiger in 1 region at a given time. That’s how the myths spread about man-eating tigers.