Question on Enmu’s plan...

Elvarth said:
The movie did not adapt well the reason Enmu had consumed too much time before Tanjiro awoke. The manga explained quite clear:

1. The first reason is explained by other members above: some slayers, especially Pillars can sense blood thirst from demons. Look what Rengoku did to the girl. In the manga, because Rengoku's unconsciousness realized his enemy was a human, so he just stopped her but not killing. The movie cut those lines from the manga.
2. Second, audience, who did not read manga, also asked why Enmu did not go directly into the dreams of his enemies. A good example is what happened to the boy with tuberculosis, who entered Tanjiro's dream. The boy was influenced by Tanjiro's kindness and refused to hurt the latter. Enmu knows that risk, so he never enters other people's dreams directly. Enmu said that in the manga, but Ufotable cut those lines.