You DID have an argument
... until you conveniently validated every complaint Sony has for turning off "OtherOS"...
Sony (apparently) doesn't have a problem with people selling off old equipment to others; heck, how else are people going to be able to afford the latest and greatest of the East? But proudly(?) trumpeting how you pirate the software at all costs simply drops the floor out of the validity of any argument you had.
Sony WANTS to hear more of this from people like you - like the wail of tortured souls of the damned, you fuel the infernal engine of Sony's claims. Please note that Sony will probably decline to suck your appendages and simply pat your belly, since you are rolled over anyway.
What Sony did was NOT ethical and it was NOT fair. You can't throw stones if they are all single sheet paper (pirated) copies...