I agree with this. I scrolled through the github page, then I went to the main homepage, scrolled through that and closed the tab. I wanted to see what it actually did before investing more time reading about it and seeing how it works.
Asking people to upfront invest their time into something without first selling them on that thing is a big no no.
Yes even/especially for tech projects and libraries.
...and I am even this guys target audience, a React developer who makes a living with it.