I found it useful to occasionally go up with my instructor on the days I was told it wasn't flyable
That can be very useful, but I think a lot of students don't like it - because the PPL costs a lot more money that way.
There are instructos who do the "right thing" (for the right type of more able student) and take them up in less than great weather, and that produces a better pilot in the end. But there are also instructors who are less than honest and they take people up in unsuitable conditions; I have met some of those.
Can't have it both ways.... but I do think the total reliance on map+stopwatch nav in the PPL does result in a lot of training opportunities being wasted.
Let's be honest - nearly all pilots who hang in there long-term go out and buy a GPS ASAP.
We seem set for a number of days with low cloud but only a thin layer; perhaps blue-sky VMC at 3000-4000ft. I wonder how many instructors will take PPL students up there and do some radio nav? I would.