It's not much of a discovery. I could have told them that bodily processes are governed by chemistry. That does not say anything about what life is however.
I disagree. For example, the reason some compounds are called 'organic' is that it was once thought they could only be part of life processes: that there was something special about them because they were part of living things. We now know that isn't the case.
So a vital force that cannot be detected is said to not exist. So why is it that science is silent on religious things such as the existence of a soul? Is it that science is actually not silent about such things when it says life is chemical in nature?
If you can give a way of detecting a soul, it would become a matter of science. Science has investigated these questions and found no evidence that souls or spirits exist. At that point, the best bet is that they do not. And until a way is found to detect them, that is the best description.
That surely would also include the non discovery of a vital force.
Yes, in spite of actively being searched for.
But to define life as physical does cross the boundary of science not being able to say yes or no to spiritual things. In theory I guess no it does not but in popular culture science is saying :"Hey world, life is nothing chemistry". And of course atheists and sceptics use science to say that there is no spirit.
Until there is a way to detect 'spirit' there is no good reason to postulate that such exists. And, until there is actual evidence for such a thing, there is no reason to include it in our explanations.
Sure, go ahead and speculate about such. But realize that for it to be meaningful to say such exist, that some method of detection must be found. Until that happens, all it is is speculation.