@themanual4am Hurry for gender-neutral science boners. ;)
I'm not sure what you mean by "psychology's stance on introspection," but it certainly is interesting to compare your statement to the paragraph about cells.
One big problem with introspection is that you can only apply it to a single, human mind. Those folks studying microbes in pond water had an incredible variety of examples! They could make statements about single-celled life generally because they could see patterns across species.
When it comes to minds, we're at a huge disadvantage. It'd be great if we could start by studying simpler examples, but we can't. The best we can do is study brains and behavior, which just isn't the same.