It's ironic that I have an anecdote that I recently read that feels very fitting here.

Permutation City by Greg Egan. Post-human digital consciousness via uploaded brain-scan becomes possible, and there are interesting questions about how the "sense of self" is derived, and how much someone can change themselves before they are no longer the same person. There are many different characters that deal with a newfound immortality in different ways, and either embrace, or shun, the ability to change themselves at a whim to fit their needs or wants. It's a very prominent part of the overall plot and is prevalent right up until the last sentence.

Also, separate from that, I have the exact opposite feeling as OP. When I'm reading a book, I feel like my world is expanded in new directions. I tend to see certain things from slightly different perspectives in the context of what I'm reading. I've been reading Greg Egan's entire body of work (after reading Diaspora and absolutely fucking loving it), and some insight and thoughts I had about the book Quarantine actually pushed me to make positive changes in my life that have been really hugely impactful, and I don't think I would have had the courage or drive to make them had I not been thinking about my life in such an abstract manner.