Ignorance and the fact that mowing zoysia is like trying to mow bamboo. Yet at the same time, there is resistance to cutting bermuda and zoysia as low as it is supposed to be.
I have to warn prospective zoysia lawn owners about what it is like to mow zoysia all the time. They are frequently told about how hardy, herbicide resistant, and drought tolerant zoysia is. They are not told about how zoysia needs a reel mower set for blade contact and a substantial relief ground into the reel to mow. The no relief/zero contact setting intended for bent and bermuda greens mowed daily does not work on zoysia mowed weekly. At least it is possible to get a reasonable cut on common bermuda with a rotary, if the lawn is level.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738