You still can't seem to separate the difference between making little shapes out of pure, unformed aura, and directly shaping transformed aura.
Does Bisky make blades out of her aura? does she make spikes on her knuckles when punching?
does ANYONE ever do that, despite how incredibly useful that would be in a fight? no. they don't. not even the people who show off these little tricks.
shaping transformed nen, is not the same as simply forming your pure aura into little symbols. when Razor makes his devils, he is shaping his transformed nen(made to mimick cloth, flesh etc of a living being) into the devils.
When Gon uses scissors, he is not just forming his loose aura into a roughly blade looking shape. he is shaping his TRANSFORMED aura, that has taken on the properties of a blade, into that specific shape.
manipulating the shape of transformed nen is an entirely different beast. Again, why did Genthru not simply create extended hands made of aura to use his ability, rather than using his own hands that he had to protect with gyo?
shaping natured nen is entirely different. when people transform their nen, it is either totally unshaped(Hisoka, Killua, Genthru, etc), or it takes on a SPECIFIC shape, along with a specific type of nature manipulation(Netero, Razor, Machi, Gormaru, etc)
it acts very close to a materialization ability.