So it is possible to short something out
Why set such a button there. It is easy to push it when doing a measurement.
Well, it could be possible if the probe is connected to the test point, but usually you switch to REF position when the probe is in your hand, and usually you want to see the "zero" position on the scope's screen, without reaching for the scope's front panel controls.
bes regards and best wishes for an happy new year.