Ms is a forbidden knowledge I'm pretty sure theres only few people in the uchiha clan who knows that this could happen.
That's exactly why fugaku is dangerous (he knew this) imagine this if 3 tomoe sharingan users all of them started awakening their MS ability at the same time, day, forget about the third forget about the 20 elite ninja's that killed the 2nd. Imagine a another obito in a different lvl of space time ninjutsu, let's 20 different susano or more, etc etc etc, bruh imagine a ms user that has the powers just like shisui's eyes same lvl of power imagine that.
That's why the uchiha had to be wipe out because of that.
Their power is dangerous especially that time like if this power also came to the wrong hands it's dangerous.
That's exactly why fugaku is dangerous (he knew this) imagine this if 3 tomoe sharingan users all of them started awakening their MS ability at the same time, day, forget about the third forget about the 20 elite ninja's that killed the 2nd. Imagine a another obito in a different lvl of space time ninjutsu, let's 20 different susano or more, etc etc etc, bruh imagine a ms user that has the powers just like shisui's eyes same lvl of power imagine that.
That's why the uchiha had to be wipe out because of that.
Their power is dangerous especially that time like if this power also came to the wrong hands it's dangerous.