These releases coming from University PR departments (this one's from UCSF) aren't really supposed to make it into newspapers for wide consumption. Their target audience is:
1. the people working in the same field—in other Universities, or in industry—who maybe don't have time to read journals, so you've gotta get their attention actively with a "billboard" announcement, rather than putting it in a journal they have to explicitly decide to read;
2. the people who fund the university, who want to see what sorts of neat things their money is being spent on.
Pop-science journalists sometimes glom onto these releases and make them more than they are, "retargeting" them for public consumption. You can certainly object to that. But as originally delivered, these publications are blameless for that.
The level of detail in a press release makes it usually pretty useless to a scientist, it hides the important details behind language intended for non-scientists. The abstract of a paper is much more useful if you need to decide whether it is of interest for you at all.
I enjoyed hearing about this new approach to infection control that is its infancy regardless. I felt a little hope for a creative solution to our current crisis and I didn't have to wade through the literature on camelid antibodies to do it.
New technology has always relied on a certain underlying optimism that you can do something that's new and better against the odds (since most fail).
Would you like this better if there was a disclaimer explaining in vitro/in vivo or just the long road from basic research to wide spread deployment?
Though I think it would have been better to wait until peer review before making a press release. This is not a paper that has immediate clinical applications, and the peer review might still turn up some problems with the paper.
There are multiple aspects that are novel here: their size, the trimer (rather than a cocktail), and their stability/delivery. All of these seem worthy of reporting. They say they're about to start clinical trials to see if they could be efficacious; they don't say that they will.