They try to assert that they do more:

https://www.postman.com/alternatives/postman-vs-curl/
damn it's becoming hard to extract links from google redirects... This one's YouTube
https://news.ycombinator.com/item?id=30498724

Google also adds that you can create fake endpoints for testing, which I think, would be pretty useful in certain cases.

On the other hand, it takes 2 hours to code up a server that would give placeholder responses.
Maybe add another 2 hours to add the ability to read JSON schemas, to let you create endpoint schemas and feed them without having to hardcode endpoints and responses.
And this is in human time terms. If you are using AI, like the people affected by the above change, you can probably whip up your own hardcoded endpoint for each project within minutes.

Rest of it is just sharing of configs and all that bs that all other business focussed applications add.