I heard that it makes no sense to learn from books for self-development

A staff of a battery maker came to my university, and talked about how important the battery maker is for the future.

One of the impressive things I remember is that the staff said we had better not read self-development books which are thought to include strategies to succeed in job-hunting.

Concern about job-hunting is likely to drive job-hunters to buy such books.

But, first of all, I don’t have enough time to read such books.