A text like this may not introduce the reader to any new-to-them CS content. Instead, especially if they have a good bit of experience behind them, it reorganizes their thinking. Which can be just as valuable.

For one, it's not a book on anything state of the art. It describes very well known concepts and techniques.

It's more of an introduction to programming and functional concepts and such than something where someone with 25 years of experience or a CS degree will learn much new from.

Yes, the book is entertaining. But there's more profound enlightenment to be had however when working with actual functional programming for a few years in a supporting language and afterwards nothing in SICP is new.

However I wish I would have read this book when I was an undergrad.