I just meant that other human endeavours are less constrained by facts and thus we explore the space of possibilities in many many arbitrary ways. If you shun a cultural reformer it's unlikely that a thousands of years from now people will spontaneously recreate the same culture. Yes, there is some degree of convergent evolution even between cultural artefacts, but I think it's fair to say that science is more objective and can as a whole survive individuals not living up to it's standards