Board Thread:Episode Discussions/@comment-25319479-20170621103621/@comment-734582-20170626141901

The Wikia Editor wrote: Mitsuki allows to continue to happen because he doesn't quite understand empathy yet and because he wants to continue observing Boruto's eye. Well like him, Boruto has a power he can't really control, so there's that. But more practically i think Mitsuki simply knows the guy via Orochimaru (IE a previous Orochimaru experiment) yet has no clue how to properly beat him, which is why he didn't try.

Orochimaru's experiments were unleashed en mass after Orochi's death and it's quite honestly surprising that we haven't seen more of that. There must be hundreds if not thousands of experiments walking around, to say nothing of the labs that they could've raided and the previously forbidden or rare powers held within spread to the public, or really any local power with an interest.