> they are no more convincing reasons not to use it to license as the arguments against GPL3.
The GPLv3 defines rather exactly what is allowed and what is not. That's what a license is for: defining exactly what is allowed and what isn't (which does not contradict that there are purposes for which the GPLv3 is suitable and ones for which it is not). NC for Non-Commercial in Creative Commons on the other hand is some wishy-washy term that does not clearly define where the boundary between commercial and non-commercial is.
The GPLv3 defines rather exactly what is allowed and what is not. That's what a license is for: defining exactly what is allowed and what isn't (which does not contradict that there are purposes for which the GPLv3 is suitable and ones for which it is not). NC for Non-Commercial in Creative Commons on the other hand is some wishy-washy term that does not clearly define where the boundary between commercial and non-commercial is.