Absolutely. That's why people who use blinkist and stuff are doing it wrong. For a book to be useful it needs to work on you, you have to let yourself marinate in it. The time spent is in itself the biggest part of a book being useful. Just plucking the main ideas by themselves into bullet points do nothing.
Blinkist and skimming a book have their place for getting some of the key points, it's hard to find the time to read all useful books.
But I agree that to really get the most out of a book, reading cover to cover is likely most immersive, impactful, maybe followed by listening to the auduibook from start to finish.
I think this is another wrong idea. You can never read all useful books. The whole idea of "all" useful books is faulty. You should read a book you really like and immerse yourself in it. The only time I think it's close to what you are suggesting is if you're prepping for a test.
