The reason why the reversal test so often defeats status-quo bias is that the defender of the status-quo inevitably thinks that we currently have just the right level of whatever (they don't want it to move in either direction) and therefore has to provide some plasible mechanism as to how we arrived at a local optimum.

However here there is an obvious such mechanism, society just added fictions until parents decided we had enough. Note that there are several such fables: the Tooth Fairy, the Bogeyman, the Easter Bunny, and the various superstitions people often teach to children, such as not stepping on the cracks in the pavement.