Cottagecore is almost entirely an aesthetic and nostalgic trend.
Such aesthetics have a long history, well illustrated by bucolic visions of "simple" peasant life from the classical Greek and Roman era , e.g. Theocritus in 300 BC [0], to the 19th century paintings by John Constable.
It has little to do with the actual realities of living a rural agrarian life. Let alone a pre-industrial one.
So the tone of much of the discussion in this thread (technology vs simplicity) a little curious, to say the least.
[0] https://en.wikipedia.org/wiki/Theocritus#Bucolics_and_mimes