BPF
Most low time ppl x-country flights in the UK are below cloudbase or under controlled airspace.
The reality of pilots 'practicing' for this situation frequently when they can barely afford to stay current is not going to happen.
The earlier example of a 'practice partial power loss at 5000ft in a cub' seems to be more of an inconvenience rather than an emergency.
In the UK airspace;cloud base and controlled airspace keep vfr flights to the low side of ideal,and so the time question becomes very important.
Possible air starts and complete system evaluation takes time that a LOW HOUR ppl does not have.
Commercial and Military trained Pilots are constantly 'checked' on a regular basis,and also practice as the norm.
To compare this for a low time ppl is unrealistic,he must be taught 'survival' and also route planning taking terrain suitability into account.
What we are talking about here is a non pilot induced failure not something that should be covered by normal safe flying practice.