hisboidedus/hitbodedut

Because the hisbodedus one reads about in the biographies and mussar seforim requires a lot of the person undertaking the process. Not everyone is capable of going through it. It’s not some spontaneous gesture one enters into lightly as one might a seminar or drasha.

It requires much training and guidance from those who have achieved that level of spiritual development before, during and especially after the ordeal.

I’m not even sure how many people succeeded at it in previous generations. However, in our day, not too many people are in such an enviable position.

Even if there are such people, it’s unlikely they’d advertise their accomplishment.