Have you read the article? It's about how type 2 patients, for whom insulin isn't the best option and who make up the majority of diabetes patients could end up having to use insulin because it's cheaper.
"In place of capping the out-of-pocket cost of just insulin, lawmakers should cap the out-of-pocket cost of all diabetes medications."
I think the point is that insurances might not pay for the better options as willingly as they do now if there's a cheaper option. But I understand too little of the US healthcare system to be completely sure.
The problems aren’t the treatments, the problems are still the assholes pricing the treatments that exacerbate issues with treatment affordability and selection.