I don't think you understand what was meant by 'fundamental'. It is something that 'is' and is not created by any process. Consciousness is a fundamental part of reality in my view.
What makes you think consciousness qualifies as fundamental, especially if it is 'created' by physical processes?
We also have a slight difference in definitions here. I see 'funamental' as meaning the baseline level for understanding. So, the physical world is fundamental because it underlies everything else (whether or not specific examples are created by some process from other physical things).
I don’t think I need to say much about fundamental since I agreed with what Polymath257 have written above.
If consciousnesses are part of the process of the physical brains and sensory organs (eg eyes, ears, nose, nerve systems), then understanding how the physical works, is understanding the fundamental of the physical brains and sensory organs.
Since consciousnesses cannot exist without the physical (eg living brains), then I don’t see why you could object to what I say?
Without life, brain will die, and so will any process, and then all consciousness will cease. Consciousnesses don’t exist independent of the brains’ functionality.
And there are scientific and medical evidences that external interactions that can affect the brain, can also alter a person’s consciousness, such alcohol, drug, suffocation, head injury and trauma, etc.
A person suffer from brain damage can have his or her consciousness hampered or affected. This damage will or could also affect their behavioral and emotional disposition.
Lastly, the author quoted (in the OP) from Psychology Today, is expressing one’s opinion, which other psychologists can agree or disagree with, isn’t peer reviewed journalism, not unless it actually provide reviewable data.
And Rawlette never provide any data to her research, hence not peer reviewed article. Where are her data?
And psychology isn’t exact science, since there are so many different variables that will lead to different analysis, different conclusions, and different treatments or therapies. (It is possibly why I am not good in psychology.)