Just to offer another perspective, this covers just how difficult the burden of administrative tasks already is for physicians: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8522557/
Not all physicians work for a hospital, so I don't think they all have much access to large departments that can take up the slack for them. It's difficult to ask them to chase our insurance for us when the paperwork they already do is driving them insane and taking them away from their patients.
The solution, as you said, is single payer. The overwhelming administrative overhead is a symptom of a very broken system. Nobody directly rendering or receiving care is benefiting from how things currently are in the United States.
It blows my mind that the railgun is still bad after they released the Quasar Cannon, considering the QC is better at killing heavies than the railgun was pre-nerf. Now the railgun is only good against hive guards, which the AMR can deal with much faster and with more ammo to spare. I'd rather the railgun was made a primary or they just completely reverse the nerf so that the railgun is an option again.