Exactly that.
I also think of reading self-help books (or management books) as giving myself time to engage with the subject. Even if there is no groundbreaking new information, it gives me time to think about the topic. If you couldn't tell yet, I'm a slow reader.
I am not a slow reader, but I realized what you did - that these books give me a chance to engage with the topic and if I spend enough time with a subject, I might learn something from myself even if I learn zero from the actual book.
My solution to this problem is to set these books next to one of the two comfy chairs in the house. When I sit in one of these chairs, I consider whether I want to read a chapter, I can only read one chapter, I can only have two of these books going at one time.
And under the system it takes me about three months to finish one of the books up from less than a week. I also find I no longer hate• most of them and I learn a lot more.
• they still have a very high DNF rate.