I myself am in possession of a few KOMs on, for everyone, simple segments. Despite my age (40 years) I don't think this is such an achievement. But if I look at my weight (128 kg), then yes. If I look at all my ridden segments, I would have a lot of KOMs under the "115kg or more" weight category. I am also proud of this. But if I look at the "Route du Col de Sarenne climb" segment, then of the 42850 people who have completed this segment, I have no less than 216th place in the ranking. Also the 1st place looking at my weight category. I am very proud of this.
Now these "KOMs" are just not visible anywhere, you have to search in your activities.
Perhaps it is an idea to create KOM categories in addition to the KOMs that relate to your age and your weight. For example the "WOM" (Weight Of the Mountain) and the "AOM" (Age Of the Mountain).
Now many people will not be interested in improving their fastest time because of their age and/or weight. Especially on segments that have also been ridden during the Tour de France or something like that. But if an older / heavier person sees that he / she has ridden a 2nd time in his age / weight category, he may be extra motivated to improve his time during his next ride.