Your second point is an interesting discussion. You are correct that in its infancy, psychology was criticized for claiming to be a scientific field and not living up to that assertion by performing quality research. I believe that this question has been put to rest as the rigors of publishing in psychology require randomized, double-blind, placebo controlled trials.
“Your manifesting results comprise a chain with a zillion tiny links—moments, experiences, conversations, physical objects, and coinciding events—all leading up to what you'd consider "the finished product" or the goal achieved. Be open to recognizing and appreciating every link. Normally the mind glosses, or even steamrollers, over them, discounting them as stupid, unimportant, too-little-too-late, irrelevant or uninteresting.”
Law Of Attraction Intention Point
It's curious that people who believe in a LOA are critical of those who don't and believe them to be close-minded. I have presented a lot of new data such as the erroneous science and the data showing that acting as though you had already accomplished your goals was detrimental to you doing so. Yet, LOA proponents do not look at this with an open mind and reconsider their belief system. In this way LOA is akin to a faith-based religion, except that religious beliefs can't be disproven.