I think you're raising a fair point. I was won over by the distinction of scientific versus engineering progress. The idea being that scientific progress had to have added something to our scientific understanding. An example I used in a sibling post was how you don't necessarily learn more about ballistics if the only way you could hit targets was a more powerful gun.
That said, I have to grant that is probably too reductionist. I think I like the idea, as it is just trying to be specific with types of progress, but I don't know if that is an accepted standard, or just one being proposed.
I totally agree we live in a world where publication incentives create perverse anti-science problems, with file drawer bias, p-hacking, falsifying data, etc.
I'm just saying that in the essay, the author seems to go waaay too far in claiming that it can only be scientific if you can tack on some type of "explanation" (which, we could even debate what that means and how you could know if you have the 'right' or 'complete' explanation).