Who said anything about a burden of proof? The point is that you can't make an informed decision about whether or not the status quo is a good idea unless you

Who said anything about a burden of proof? The point is that you can't make an informed decision about whether or not the status quo is a good idea unless you understand the reasons behind the status quo. If you don't understand the reasons behind the status quo, your opinion is worth diddly squat one way or the other. That applies equally whether you are inclined to keep the status quo or reject the status quo. So, to me at least, the parable isn't about privileging the status quo but about making informed decisions. Someone who assumes the status quo is without merit is not making an informed decision.