It's a matter of perspective and expectations.

The automobile was a useful invention. I don't know if back then there was a lot of hype around how it can do anything a horse can do, but better. People might have complained about how it can't come to you when called, can't traverse stairs, or whatever.

It could do _one_ thing a horse could do better: Pull stuff on a straight surface. Doing just one thing better is evidently valuable.

I think AI is valuable from that perspective, you provide a good example there. I might well be disappointed if I would expect it to be better than humans at anything humans can do. It doesn't have to. But with wording like "co-scientist", I see where that comes from.