Raba of Parazika replied: In the case of a sukkah, since [it is usually intended] for the use of an individual, one might not remember [the altitude of the roof]. In the case of an entrance however, since [it is made] for the use of many, [the people concerned] would remind one another.
Sounds reasonable. Unless it isn’t. Are people really that careful about communal responsibilities?
Raba of Parazika replied: In the case of a sukkah, since [it is usually made] for one individual, that person realizes his responsibility and makes a point of remembering [the conditions of the roof]. In the case of an entrance, however, since [it is made] for the use of many, [the people affected might] rely upon one another and so overlook [any defects in the cross-beam];
for do not people say: ‘a pot in charge of two cooks is neither hot nor cold’.
I love that the same person can have two contradictory opinions. But I also love that last expression. Or, as Douglas Adams might have it, it’s an SEP: somebody else’s problem.