So, here's one big final question—why worry so much about Magizoology anyway?
After all, if some of these creatures are dangerous or violent or might reveal wizarding secrets, why not just get rid of them?
Mr. Scamander believes that witches and wizards have a duty to keep these creatures around to ensure that future generations will be able to enjoy them and study them as well. Sounds like a pretty good reason to us.
This book is just an introduction to the world of fantastic beasts. There are seventy-five species in it, but more are always being discovered (which means more new editions are yet to come).
For now, Mr. Scamander is very happy that many generations of witches and wizards have learned to know and understand fantastic beasts through his work. Awww.