Of course, that might also be the time to learn one of the many things that a PPL course doesn't cover.
Well, it should be covered. The Notams, TAFs and METARs should always be part of a student's PPL training. It is certainly a part of all approved syllabus and a requirement of the skill test. People can be reticent to ask for clarification of issues they do not understand and that is always difficult to overcome. The wisdom: 'the only silly question is the one you do not ask' should be at the forefront of all teaching.
Why would anyone want to fly to a destination only to discover on arrival that they cannot land, when they could have known that before taking off. Why get halfway there with a problem only to discover that your alternate is closed for whatever reason.