Board Thread:Boruto Discussions/@comment-1452242-20170117195252/@comment-734582-20170121220751

Elveonora wrote: I think some people around here really like black balls, although they are not very truthful about it. nice one.

Elveonora wrote: Again, before Obito won control over the TT there was no ninjutsu nullification Seems to me that TSB's are just mostly inert orbs unless the user specifies a property (IE turning stuff to dust). I don't believe that nullification is an always-on power, and the various inconsistencies can be summed up as a simple "because the user did't specify that property". Even though the Fourth War is light on explanations, it's clear that there ought to be drawbacks and limits to powers. TSBs don't have always-on powers. If the user's not focusing on an effect e.g. nullifying, it's not happening.

My personal thoughts on this is that Obito had a special hatred for Minato and did his best to hurt him more than the others. Madara was pedantic about wasting power on lowly people so probably didn't think to nullify Sakura.