The article presents what appears to be a plausible, evidence-based hypothesis as to why skin color in particular (not exclusive of other factors) might lead to inaccurate results for dark-skinned people. It then mentions studies done to either confirm or reject this hypothesis, and that the results seemed to confirm it. They link to a follow-up study done here.
You're only giving vague, general dismissals. If you believe the conclusions reached are in error, what evidence do you have that pulse oximeters are not affected by skin color?
I'm also not suggesting we ignore skin color as a relevant factor. I'm taking issue with the idea that everything that involves skin color is evidence of bias or other more malicious underlying causes.