TC . Completely agree . In all my years I think I have only actually flown straight over the top of these mountains about half a dozen times . Quite often it has looked tempting but I think would have bounced the pax around quite a lot ! Sadly it appears that no one has any suggestions to try to help the situation. Personally I will get my son , who has ppl(h) , some experience flights into bad viz to get a feel of what it's like .
Then get him to make decisions as to where to land and when to turn back . Lastly I would let him fly into full IMC and realise it's not a place he ever wants to be without the right tools to hand . I know that worked for me all those years ago and that was in a Bell 47 !! Sadly this may not be an option for everyone else out there ....
Ps Before DB froths at the mouth I confirm that a fully rated IFR pilot will do this and not me !!