we follow the torah because we believe torah meseenia , that doesnt stop us from believing as well interesting facts about the textiles involved
it doesnt necessarily mean this is the reason why hashem commanded us not to wear shatnez but its an interesting fact
just as they may find some scientific reason why its unhealthy to mix meat and milk
thats not the reason why we dont mix them we dont mix them because thats what the rabonon deduced from the torah so whether theirs a science behinfd it or their isnt we follow it nevertheless