There seem to be clinical trials underway for regrowing teeth in Japan: https://www.popularmechanics.com/science/health/a60952102/tooth-regrowth-human-trials-japan/
I gave you three sources that are influential to my views. A Spiegel article, a conversation with someone who in the past was planning to run a brothel (and spoke with people who actually run brothels in Germany for that reason) and police sources.
I did not link to some activist NGO run by prudish leftists or religious people or making claims as a reason for me believing what I believe.
In general, it's hard to know what's actually going on when it comes to crime. If you spoke in the 1950s about the Italian mafia, you had plenty of people calling you racist against Italians and say that there's no mafia.
My point is that the behavior is not well modeled as "hunting humans". They don't attack humans with the intent to kill and eat as prey.
The dogs are not hunting humans but want to defend territory or something similar.
If we take the issue of forced prostitution and the official numbers are estimates and by their nature estimates are not exact.
https://www.spiegel.de/international/germany/human-trafficking-persists-despite-legality-of-prostitution-in-germany-a-902533.html would be a journalistic story about prostitution in Germany that describes what happens here with legalized prostitution.
I was once talking with someone who in the past was thinking about opening a brothel and who had some insight about how brothels are run in Germany and who said that a lot of coercion is used.
Recently, I read something from a policeman who was complaining about how the standard of proving coercion for prostitutes is too high. Proving that a prostitute who's over 21 who left was beaten was not enough in court to convince the court that she falls under the criteria of outlawed exploitation of prostitutions.
The key issue I raised was not about the exact number but about prostitutes not being prisoners of war and still better modeled as slaves due to dominance than slaves due to poor bargaining power.
I consider it worthwhile to provide sources so that you can read their methodology yourself. I don't see a good reason for me to give you my interpretation of their methodology.
The current number for slaves in the world in something like 50 million. It's a significant amount of people. In prostitution, you unfortunately have women that are enslaved with violence and other forms of dominance that are not just about the poor bargaining power of the prostitutes.
When it comes to Buddhist practice, it's worth noting that practicing techniques by the book is not how Buddhism was practiced for most of the time in the last 2500 years. It was mostly an oral tradition and as such the knowledge that's passed down from teacher to student evolves over time in various ways.
Many modern Buddhist tradition put much more emphasis on meditation in contrast to ritualized behavior.
In Buddhism (and in Christanity for that matter) for thousands of years meditation was largely done in monasteries and not by lay-people. In many Buddhist communities "lay-people aren't supposed to meditate" is something you could call "ancient wisdom".
In someone convinces you in a Western context that following some practice is ancient wisdom, they are likely doing a lot of picking and choosing in a way that does not make it clear how ancient the thing they are promoting actually happens to be.