This is such a genuinely useful way LLMs can truly help people. A maze of thousands of information-heavy pages distilled into a single input box. A lot of people get stopped short when presented with too much information - it's daunting. Stuff like this, while super boring and obvious and uncool, totally enables people
I agree, although I think one thing they could improve is giving more examples of what you can try, making them clickable to test the prompt yourself and see the result.
I find prompt boxes without many example usages to be sort of a void on the usability side of things. People can feel stuck without some guidance.