The pathology for broken collar bones was changing right as I took up mountain biking, and subsequently shattered my collarbone. It was hotly debated at the hospital, if my specific case should be operated on or not. Each time I had a checkup, one doctor would say "wait and see" while the other was saying "I can't believe we didn't operate on this". At any rate, the outcome was as good as if they had operated on it,…
Even with this mess, it was hotly debated for around two weeks whether I needed surgery. A good chunk of my collarbone was trying to push through my skin and the other half was fusing to my scapular and was starting to compromise nerve function. Even then, because the non-surgical route is now considered the standard, I was meeting resistance to have an ORIF. It seems that the about turn from surgical intervention has been so strong that getting ANY surgical intervention is a battle.
I eventually came across a surgeon who took one look at me (never mind the imaging) and scheduled me for surgery. ~18 months later I’m now on a waiting list to have the plate removed, and strangely have gone off cycling… Surfing has happily taken its place.