Never seems to go away, this idea, but should we bring back a load of stuff what used to live here?

http://www.theguardian.com/environment/2015/jul/15/rewilding-britain-launches-with-the-aim-of-restoring-uks-lost-wildlife-and-habitats

My, quite surprising, hot take is that it's a load of bollocks and nature should be left 'unmanaged' as much as possible. I mean, at the end of the day, we're all invasive species, aren't we? Right?