You just described one minor use case of the tools and claim it's not needed anymore

It's like saying cars are obsolete now because you only used yours to go to the church and use your bike for that now

Don't know about Postman, but Bruno has much more to offer. In our team we use an exported shared collection (stored in github) of all the extensive APIs of all the apps we share or even those we just use so that anyone can just import that and use them