I agree they may not be useful, but the question is - why inject blind?
I think we should all start injecting blind. Perhaps unethical, but how else can we fight the ridiculous medicare. When they bundle a prodecure reimbursement, they are essentially saying - that the "guided" part is not needed. They are saying - we will pay you regardless if you use guided or not. They are also saying, it doesn't take experience, training, etc - to use guided. Because if they understood this, they would reward/reimburse for doing something that takes more skill, and ultimately - is more effective.