Firstly let me make you correct..They wont become DOCTOR one day. If they wish to be called so, then they are at fault.Secondly No two professions can be compared. Medical field comprises of not just Doctors, nurses, paramedics or physio people but it is a combined approach towards achievement of better health. What Doctors do, physiotherapist cant do and what physiotherapist do , a doctor cannot do.I wonder why this question even come in anyone’s mind, be it a doctor or PT. Being a doctor , i have been in close touch with PTs as a doctor as well as a patient. And i can assure you all very well that i myself have learnt a lot from them. Medical science is such a vast field that it has been divided among its important pillars such as docs, nurses, paramedics, PTs. No one knows everything. So its better that we keep ourselves to our profession only and dont compare it with our fellow people. Without being in coordination with each other, We cannot treat our patient.
Source: Quora Digest