no u shudnt segregate physical and organic and also inorganic for example the reaction mechanisms are many time reinforced by thermodynamic , kinetics etc which come under physical chem . now a reagent used may be inorganic so definitely u even study reagents .
all the three branches go hand in hand .
moreover many carbon compounds are inorganic look at co2 .
at the same time physical chem. deals with carbon which is also a physical element u see . so there are inter linkages between all these fields but for our convineance what ever is told to u in the above threads is correct.