Why don't you try using these tools yourself so you have an understanding of them? People like to get shit summarized, its really not as deep as you are trying to make it out to be.

sometimes you don't have time to read an entirety of a large article. You want a quick summary, some people are poor at summarizing things in their head as they go and can get lost in dense text. Extensions like these really help me with headers, structure that I want to follow, quick overview and gives me an idea if I want to deep dive further.