The pictures showing type I II and III would lead one to believe that the skier type is equivalent to skill level...
The DIN setting from the industry standard charts can be a great starting point. Your skiing experience might indicate the need for minor adjustments (e.g. too early release, or releasing when not necessary). If that happens often, you should double-check the boot soles for snow/ice, and then perhaps adjust a minor amount higher DIN setting.
Skiing is a human athletic endeavor. It has a huge range of style, ability, skill, speed, strength,and force vectors. Hopefully (and I suspect it is true), the allowable "safe" DIN setting for a particular skier is not a tight narrow band, but rather a range of settings that are adequately low enough to reduce the chance of injury, and adequately high enough to prevent pre-release.
Skiers at the extreme ends of the scales may not be able to achieve a setting that is "safe". (e.g. An extremely week-boned or ligament-impaired person. Or the strongest, fastest, most aggressive downhill racer). In the one case, a safe setting would lead to premature releases. In the other case, the setting adequate to prevent pre-release will occasionally not release before some leg damage is done.
For us recreational skiers, the chart is an excellent starting point and MINOR adjustments after on-the-snow experience may be needed.