I thought the idea was to allow the consumer to buy the plan as it stands, regardless of where the insurer is located. Otherwise, as you pointed out, the provision is pointless.
In our damn state of Washington, our DemonRAT governor will make sure the insurance companies bend over backwards to their demands. Ask Mike Kreidler why we don’t have insurance across state lines:
https://www.insurance.wa.gov/connect-with-us/ask-mike/