rustle
I'll take responsibilty for my knowing how to use the AIS website, the Met Office website, my GPS, my engine(s)
Unfortunately:
A PPL student is not normally trained to use the AIS website.
A PPL student is not normally trained to get notams through any other route.
A PPL student is not normally trained to use the MO website.
A PPL student is not normally trained to use any internet weather source.
A PPL student is not normally trained to use a GPS
A PPL student is not normally trained anything about engine management; most training is done with mixture fully rich.
Very few PPLs read pprune.org.
Very few PPLs read flyer.co.uk.
Very few PPLs read any other pilot website.
So it's no good moaning that everybody should know this stuff. The pilot community on here (and other places where I guess you hang out) is almost completely un-representative of the private pilot population flying around.
Otherwise, I agree with you 100%
To be practical about it, if the CAA was looking for a way to improve things, I would suggest that some action on the instructor front would be by far the most productive.