their approach was basically calvinist: the only recourse at the face of suffering is to try to explain it away. 'suffering only happens to those who deserve it' (their unstated reason for not worrying so much about the suffering of humans), 'suffering serves a purpose' (the bit about 'a tool to evolve'), etc
in this bleak dead-end worldview of protestantism with no salvation they'd tricked themselves into, the possibility of suffering being contingent (the 2nd noble truth) & therefore able to be eliminated (the 3rd noble truth) didn't seem to even occur to them as possibilities. the options what we might loosely call the 'western worldview' gives us are either something being 'real', and therefore unchangeable, unanalysable, and w/o history; or it being totally fake & illusory
it becomes an untenable idea once you've identified it but until then it rules you. this is how a lot of things work. you need to look at it closely
i say it doesn't stand up to the lightest of scrutiny; and that's precisely why it's so pervasive — because it's so flimsy as to be invisible. the effect of this ideology of a nature/culture split is the reinforcement of presently existing conditions: either whatever is there is 'nature', in which case it can't be altered and is completely self-evident, subject to discovery but not analysis, or it's 'culture', and therefore can be safely ignored. so, for example, you're poor either because nature handed you a no money having skull shape and you can do nothing about it, or being poor is a totally fake idea, there's actually nothing differentiating you from the capitalist, and noöne else can do anything about it
you think 'nature' is not subject to any interpretation whatsoever? that every culture, every person, has always had the same view of every 'real' thing out there? you think 'fictional' cultural things can't have effects on people or nature? that they just sort of float over it, ineffectually? then how do you know about them, anyway, and why do people come up with them? and where does the separation itself come from? is that part of 'nature' (in which case 'culture' would also seem to be a part of 'nature') or 'culture' (in which case 'nature' would seem to be a fiction as well)?
the point of the notion of social construction is that there is no division between 'real' (physical, inalterable, immanent) nature and 'imagined' (artificial, will cease to exist like disbelieving an illusion in d&d the moment you stop believing in it) culture. that's not a conception that stands to even the most cursory scrutiny
all our categories of cognition and perception are socially constructed. that's kind of the point of the idea
single mother of 5 large adult sons. xe/she. I DO NOT FUCK HORSES