Board Thread:Theories and Speculation/@comment-1930928-20191128005957/@comment-9782468-20200106134814

Not all Hyuga have mastered chakra control, since not all Hyuga are masters of Gentle Fist. As a viewer, we were only exposed to the users who were extremely skilled, like Neji and Hiashi. Even Hinato, though a late bloomer in this regard, became a reputed Gentle Fist master.

Also, the "kai" method can work, as long as you are better at disrupting your chakra than the Genjutsu is at manipulating it. However, this is not always the case.

Naruto tried the "kai" method when Itachi used as Genjutsu on him. However, it didn't break him out. That's because Itachi's Genjutsu was simply more powerful than Naruto's ability to disrupt his chakra.

This is the case with everyone under Infinite Tsukuyomi. It immediately pulled them under a Genjutsu far more powerful than themselves. Not only that, the Genjutsu itself gave them a scenario that was basically their happiest life. This made it less likely that they'd give it their all to leave. Even subconsciously, they wouldn't put all their effort into breaking out.

Though even if they did, they are not more powerful than the Genjutsu and they'd fail.