This is not a good comparison. The GP has the technician do the imaging, but the real problem is not so much getting the image, but interpreting what's on it. This is a skill that the GP has to have either way.

The GP surely has the skills to take and read the scan.

But it's not efficient use of their time.

Ultrasound techs do the imaging/take the photos, and the physician reviews them. Ultrasound techs make less money than physicians, that's why physicians are taken out of that part of the process.

It's like saying "The dentist should also clean my teeth". Well their time is better spent on procedures, leave the cleaning to the hygienist.

In the outpatient setting it might take days or a week or more to get an appointment for a formal US, then more time for the radiologist to read it, then more time for the GP to get the results and consider treatment changes then more time to get in touch With the patient. But if I as a physician perform and interpret the ultrasound in real time I can immediately begin appropriate therapy. This is the major benefit of point-of-care US as opposed to conventional US.