The reasoned argument surely goes along the lines of:
What criteria will define the times when access is to be restricted?
Exactly which areas will be restricted?
To be exempted from the restrictions, what level of competence must one have achieved and how is this to be validated?
What sanctions will be imposed against those deemed not competent who enter restricted areas?
How will this be enforced?
How will we measure the effectiveness of such measures? Given that so many mountain rescue-related deaths are not the result of accidents in so-called high-risk areas, will a simple reduction in overall mortality be the criterion?
Will similar restrictions be enforced on other high-risk activities? For example, will mountain-bikers have their own sets of restrictions? Skiers? People who eat too much of the wrong food, don't exercise and run a far greater risk of harming themselves than do climbers and walkers on the winter hills?
So, no personal attackshere against this monumentally stupid and ill-informed person... oh, bugger, it was going so well....