I honestly don't think it would even be lucrative for him to have express (or form, really) more in depth thoughts on the books he claims to read. I imagine a large portion (not all, but it's what I've gleaned based on the comments) are young wannabe-literature-lovers, the dark-academia without the studying types. The aesthetic is more enjoyable to them than the actual task.
Imagine the kind of person who likes pop culture psychology - the meaningless slogans, the aesthetically pleasing images on instagram. Now imagine summarising actual psychological studies to them. They'd all be mentally clocked out in seconds! The same would happen to Jacques' audience. Just keep the bright colours, the tired references to whatever flash in the pan meme or soundbite is going around, and boom! A captive young (higher adsense for the younger ones!) audience.