"Easy" is probably because it boils down to, install X, Y, Z, edit config for X, Y, Z, start daemons X, Y, Z. There's no complex math or thinking involved, just plugging stuff in.
On a side note this is actually a problem, in my experience, if I find something easy I might not cover every edge case - I can cover those if and when they come up - but given enough potential inputs and users the edge cases always come up. And then what happens if I am unavailable at that moment, the edge cases need to be handled by people who will find the easy solution I built up incredibly hard and daunting.