Perhaps, but in my experience they are much more difficult to find for those who do not come from a religious upbringing. Even coming from a religious upbringing, depending on the denomination, you may have missed entire swaths of material due to it not aligning with a given particular brand of Christianity. I am generally skeptical of most modern material aimed at a general audience as it has become too “influencer”-y; it’s about who has the best catchphrases and the signal to noise ratio drops off a cliff.

It’s because of that I felt Tim Keller’s recent passing so much more.

Yes, you might be right there. It's rare to encounter mind-expanding books like Mere Christianity and the Prodigal God anywhere though, not just in Christian literature.