Board Thread:Boruto Discussions/@comment-44635412-20200715200034/@comment-45382951-20200829131846

He literally took Hanabi's eyes because her's were pure, it was stated in the movie. Hiashi's eyes wouldn't give him the Tenseigan.

And what do you mean "Boruto makes it easy"?

Kishimoto still oversees Boruto as a whole, so the idea of Toneri being frozen had to go through him and what kind of help could Toneri actually do?

He was one-shotted by BSM or BM if you are talking about the Movie or Novel respectively, and that isn't enough to change the tide of battle for anyone they have fought so far in the Boruto series. Everything useful he can do for them, he can do it whilst blind.