Write Useful Books + Building a Second Brain + Clutter-free with Kids = Throw out books?

Reading the following 3 books is bringing me to an odd conclusion: Should we throw out books once we've milked them for their value?

Write Useful Books by Rob Fitzpatrick (My favorite book recommendation from Copyschool Professional) = write books that are ruthlessly useful so they can be easily recommended

Building a Second Brain by Tiago Forte (mentioned in one of the Podcast Growth Academy trainings) = capture important inputs and organize them so you can be more productive/creative

Clutter-free with Kids by Joshua Becker (picked it up at a street library) = having less stuff makes life more productive

I know Marie Kondo got a lot of flack for her minimal book perspective. Not sure I could handle throwing out books. But if they're "Useful" enough that I've moved every piece of value into my "Second Brain" – and I want less stuff… what justification is there to keep them?

(Note that Write Useful Books is NOT talking about fiction/other books for entertainment. Strictly non-fiction, business-type, books that serve one purpose.)