I find the same thing even with critically acclaimed "Thinking Fast and Slow" or "Power of habit". On the other hand sometimes blogposts may not be exhaustive enough. IMO roughly 60-100 pages is the perfect format – you don't need to overly simplify the topic (like in blogpost, newspaper article) but you don't need to repeat yourself 10 times over (like in 300-400 page book).
I wish there was a culture where good essays would actually sell for $20. Something with a "perceived value per word" review score maybe.