Surely the individual mind cannot be lab tested, but we can study minds in general. This gives us an average that we can base on predictions on right? I mean you can't predict the outcome of flipping one coin, but you could make a very good guess what'll happen if we flip a thousand coins.
I'd say the interactions are just too complex (butterfly effect) to predict anything usefull in the trading industry, but that doesn't mean economic science isn't informed by experience.
Sorry for the ongoing attack, but your very strong claims deserve it ;)
This is what Technical Analysts do. I'll quote from a great TA named @haejin
Remember I brought up Newton in my post. His theories were very useful in mundane activities. But ultimately they were just mostly BS. You could find some patterns and statistics. They can have some limited usefulness. But they won't be anything more than some generalizations like women don't make great leaders or men suck at cooking. It all works until it doesn't. If you depend on these empirical things you are eventually going to get screwed like a space program planned with Newtonian Physics in mind.
Even the best TAs can only claim little over 85% accuracy and even they can't say anything consistently accurate about timing. Empirical evidence can be used as a rule of thumb or an archetype or a cliche. But they will never be an economic science.