Which wouldn’t be a particularly unreasonable position to take?

e.g. if we think about the US constitution and other similar documents

Whatever about other aspects of RMS he has been pretty consistent on his opinion on the spirit of the GPL and its relationship with free software since its inception. It has been a common tactic over time to question the spirit of the GPL to fit some other agenda. If others want to claim free software means something else then fine - but the original intentions of the GPL are in black and white.