>the point is that it's been made more difficult for little to no discernible benefit
That is not true either. Although it cost me some money, I much prefer having 1 type of port to worry about instead of a million types and it has tremendously improved some of my workflows by being able to daisy-chain devices together. I can sit down at my desk, plug in 1 cable and have access to everything I need. Although I had a similar setup with a dock, I was limited to the number of ports. With the current system, I can keep extending and daisy-chaining to my heart's desire.
Just because it doesn't work for you doesn't mean it doesn't work for anyone just like my use case doesn't work for everyone either. To say that there's no discernible benefit is just silly. There are pros and cons just like with anything.
>carry around dongles for everything
That's a straw man. I don't carry any dongles with me whatsoever except for a multi-purpose video adapter because I still, unfortunately, have to present in a few rooms that have VGA outputs.