1. High-quality writing relaxes me to the point that I can enjoy learning at a much deeper level
2. It’s extremely arduous to keep my BS filter constantly deployed, which it is 95% of the time I'm reading unfiltered content (blogs, Twitter, news etc)
A well-written book is a large lake of high-quality information, and so I can generally develop some trust for the author and can relax and think about things I don't know well.
There is a torrent of knowledge, but panning for wisdom is exhausting. So I think for me, rather than the form factor (blog vs book vs podcast), it really comes down to the level of refinement of the information. There are some authors that blog / write newsletters that I have developed a sense of trust for, so I can also enjoy their without the BS filter fully engaged. (Matt Levine, Ben Hunt, Scott Alexander etc)