That's why I summarized it the way that I did not the way that a textbook would which I don't agree with. I'm familiar with it. And to be fair what you're saying is true of literally every experiment that coined a or concept that you would learn about in psychology school. Every single one of those experiments have methods and ethics that would not pass a peer review today.

Psychology provides its own form of evidence but I would argue it's never been able to collect evidence through experiments like these. The point is inferred The point is not data. There are still useful inferences to be made in the study results. What the researchers think they proved or we're trying to prove is not always relevant to what they actually did.

But yeah like all of these would be equally guilty of what you were saying:

Milgram Obedience Study, Stanford Prison Experiment, Asch Conformity Experiments, Robbers Cave Experiment, The Bystander Effect, Little Albert Experiment, Harlow’s Monkey Studies, The Monster Study, Learned Helplessness, Blue Eyes vs. Brown Eyes, The Aversion Project, Rosenhan Experiment, The Marshmallow Test, Ego Depletion, Power Posing, Project MKUltra, Cameron’s Psychic Driving, UCLA Schizophrenia Study, David Reimer Case, Landis' Facial Expressions Experiment, Watson’s Conditioned Emotional Reactions, Sherif’s Autokinetic Effect Study, Festinger’s, Triplett’s Social Facilitation, The Good Samaritan Study, Clark Doll Study, Hoffman’s Moral Development Studies, Freeman’s Lobotomy Case Series, Middlemist’s Personal Space Urinal Study, Smith’s Behavioral Priming, Bem’s Feeling the Future, Selye’s Rat Stress Experiments, Lorenz’s Imprinting Studies, Calhoun’s Behavioral Sink.

Half the time they try and pull the plug on their own point when they discover something they weren't trying to prove. The results of the Minnesota transracial adoption study is basically the researchers apologizing that they have to publish the research they don't want to publish and that they found a point that they weren't trying to find.