Physics is an exact, quantitative, natural science. Psychology is neither exact, quantitative (usually), nor a natural science. They are not comparable. But like many other fields of study that are not hard sciences, psychology can still be useful and valuable. (Note the "can". Given the replication crisis, how much of psychology actually is I cannot say.)
replySure, I agree with that.
replyBut do we have an example of something that is provably valuable? I am genuinely interested: after reading this article, I realised that there is nothing I can attribute to psychology off the top of my head.
I mean, Milgram used to be one, but well...