And developers who wants to create proprietary projects are under no obligation to use GPL licenced code. What is your point?
GPL licenced code comes with conditions, such as that of granting the end users certain rights, including the right to the source code of the actual binary they recieve.
Proprietary code by definition will not grant the end user access to the source code from which the binary they recieve was made, and it typically comes with the condition of monetary compensation for it's use.
In both these cases the 'end user' can choose not to use what is offered.
GPL licenced code comes with conditions, such as that of granting the end users certain rights, including the right to the source code of the actual binary they recieve.
Proprietary code by definition will not grant the end user access to the source code from which the binary they recieve was made, and it typically comes with the condition of monetary compensation for it's use.
In both these cases the 'end user' can choose not to use what is offered.