The ability to skip the scale is nice, to show, that the group became stronger.
And the people try to manage that, because the scale is a pain.

Its showing up very late and has yet a very high chance, to create a wipe. Because it only need 1 person to stand on the false side (maybe, because some people dont notice the scale, what happens sometimes), to create a wipe and force the group, to do it from the start again.
In addition, are this scene taking some time. What make the whole run longer.