The problem is that getting there is not a journey you will survive intact. It’s brushed over in the text, but getting Yozi Charms is going to change your outlook. Look at stuff like Murder is Meat or Witness to Darkness and so on. By the time you are capable of going Devil-Tiger, whatever you started out as is going to be massively disconnected from what you actually are, such that there is a very real possibility you will no longer be the kind of person who views those broken parts as broken but instead right and proper and necessary to inflict share with everyone else.
This isn’t about having a differently-shaped mind, it’s about turning yourself into Nylarthotep and thinking you can use that power constructively. It’s the height of arrogance.