THe full text looks interesting to read - will read later.
I don't think there is a problem with regard to admitting where some of your weaknesses are. I would say that in the assessment of the spine, the average chiro is probably better than the average physio. That is because they spend most fo their training looking at the brain and spinal column whereas physio undergrads spend loads of time on EPA, neuro, orthopaedics, cardiopulm, MS, sports, paeds, geriatrics etc etc.
Having said that, in the sports area, traditionally, physios SHOULD have the upper hand because we are an active-Rx profession predominately and also world leaders in motor control and exercise rehab...
Lets not lose our grip on our expertise - chiros are certainly not dumb people. Once they get organised, they will present a serious challenge to our expertise...we have been lucky so far.
The tone of the abstract above is simply saying there are some obstacles to their recognition and implying that once these get sorted, sports chiros will be accepted... won't be long now...