These are not “surgical suites”. They are testing clinics, basically.
My GE has his own attached to his practice, and my previous GE did too, part of their GE practice albeit that one was directly part of a hospital.
They are not for surgery. They are for performing more-complex tests that require anesthesia. And we commoners frequent them.
Are you also against independent radiology clinics? Because I’ve had things injected in me there that could cause problems, including radiation in the GI tract or veins, and lord knows people can go crazy in those MRI tubes.
Any place that performs invasive procedures that does not have to play by “Joint Commission” rules I would avoid like the plague you might get there.