Otherwise it would be better to end the debate, but anyway... I completely agree with Zek (and some others). The commercialization of SVK and ardent advocates of its use everywhere (almost even for walking stairs or picking cherries in Goriška Brda), has exceeded all limits. I repeat once again, I'm not saying it's a bad thing and I certainly don't discourage it, I have nothing against its use (in some places it's even necessary – Via della Vita, via Italiana etc.), but forcing mandatory use everywhere and on all paths that have 5m cables is excessive. Then all secured paths here would be max 15 years old. As already written, today many people think that with SVK use they buy everything, but of course it's not that simple. The most important factors for safe walking on secured paths are fitness, arm strength, experience, knowledge, mental readiness, orientation and skill in moving on rocky terrain or climbing skill. Not everyone is for such paths. Regarding falling rocks - the fact is that falling rocks are often a consequence of lack of knowledge and experience in moving in mountains. How not to dislodge rocks (or that it happens as little as possible) is an integral part of knowledge and experience that hikers learn from young and can't be bought in a mountaineering store. But today it's considered that if you buy SVK, you're ready for all demanding paths, so the picture is completely different. I often meet female hikers and hikers who have neither minimal knowledge of skills in moving on rocks, nor arm strength nor experience and literally drag and hang on the cable, can't find a single natural step or hold, and besides dislodge whole avalanches endangering others. What good is SVK if you're lower on the path on gravelly base over a precipice where there's no cable, and above you a bunch of previously described ones dislodge salvos? I don't say it's the only reason for dislodging rocks, but with mass visits of variously (in)experienced hikers this phenomenon has significantly increased.
As already said, most accidents happen on slips (and certainly not falling from cable), that is on steep gravelly terrains, where experience, skill, fitness and sober head come most to the fore (and even that's not always enough). On no secured path has the hardest part ever seemed to me on the cables, but on the previously described, i.e. gravelly over precipices (and almost every secured path has such sections).
In conclusion, to the average mountaineer who considers himself experienced (not occasional hiker), and finds the Slovenian on Mangart too demanding, too little secured and too exposed, and for that reason condemns walking this path without SVK to experienced mountaineers (excluding falling rocks), has no business in high mountains. There are countless sections on all secured paths where exposure is similar or even greater, but reliable step (and simultaneously hold) due to the base is not there. How does someone who 100% relies on SVK and doesn't have appropriate knowledge and experience manage there then? SVK is in many cases a false security that hikers can do a certain path, but actually they're not prepared for such places. And to answer some comments: I in no way underestimate any path, regardless of length or crowdedness. I have equal respect for paths that take 1 hour, 3 hours or 8 hours. Disrespect and underestimation, regarding Mangart (and some others), I see in Sunday hikers who tackle the path at 11am in the worst heat, wearing canvas sneakers, and possibly dragging a dog along. After 15 min they pant as if they've walked half way to Everest. That's disrespect unparalleled for me. Unfortunately Mangart today (as primoza and redbull already wrote) due to access almost to the top is the most vivid example of what I'm talking about. The remark about extremists is in my opinion quite out of place.