I get why the thread was made so who said you shouldnt discuss the topic....
enma seemed normal for a monster like oden
but we never saw oden as a child use it aside from a silhouette
he prob got better with it as he got older wouldnt you agree?
It will feel normal too for zoro soon as with all of his blades after he initially got them
thinking he will continue to sweat after every attack using that blade is fools gold. just means zoro isnt at the level oden was when it seemed so casual for him to cut kaido.
also have to take in mind not every slash forces him to react in that manner
rengoku onigiri
and blocking kaido's wind attack etc
enma can seem casual depending on the attack thats been used. the user himself determines how much they want to pour in.
100% proof it relies on the user's haki from that standpoint.