I'm always amused when I read anecdotes from a role siloed / heavily staffed tech orgs with all these various roles.
I've never had a spec handed to me in my career. My job has always been been end to end. Talk to users -> write spec into a ticket -> do the ticket -> test the feature -> document the feature -> deploy the feature -> support the feature in production from on-call rotation.
Often I have a few juniors or consultants working for me that I oversee doing parts of the implementation, but thats about it.
The talking to users part is where a lot of people fall down. It is not simply stenography. Remember most users are not domain/technical experts in the same things as you, and it's all just a negotiation.
It's teasing out what people actually want (cars vs faster horses), thinking on your feet fast enough to express tradeoffs (lots of cargo space vs fuel efficiency vs seating capacity vs acceleration) and finding the right cost/benefit balance on requirements (you said the car needs to go 1000 miles per tank but your commute is 30 miles.. what if..).
We call those places "feature factories".
I have been required to talk with many in my life, I have never seen one add value to anything. (There are obvious reasons for that.) But yet, the dominant schools in management and law insist they are the correct way to create software, so they are the most common kind of employment position worldwide.
While I have seen this happening it usually has nothing to do with engineers and more with that fact that talking to customers and identifying requirements is a task that requires respect and practice to become good at. Procentually I've seen more junior MBAs alienate customers than I have engineers seen do it.
I have the same impression. But that is where it is going - roles merging and being able to do the full spectrum will be valuable.