The fear is not that proprietary code will become better than FOSS code. The fear is that proprietary code will become better than previously-existing proprieta

The fear is not that proprietary code will become better than FOSS code. The fear is that proprietary code will become better than previously-existing proprietary code. RMS considers closed-source code to be so immoral, that open-sourcing code in a way that proprietary code may potentially derive some benefit from it is immoral.