Modern,
You ignore the instances where the patients cannot afford the time it takes to reach the hospital and also where the lack of ALS prevents the crew from transporting to an appropriate hospital that may be further away.
Furthermore, diagnosing active heart attacks and activating the cardiac cath team cannot be done on a BLS level.
These are just a few of many instances where lacking ALS integration may be detrimental to patient outcomes.
As long as they are not offering these services or regularly treating and resuscitating sick patients, it is not offering a competitive service to the community.