I think the actual "worst part" is that the guy who was right is a guy which most people find repulsive.

That's how it usually is, unfortunately. People don't like being told where dangerous things will lead them.

Except that the reason we find him repulsive is not because of him telling us "where dangerous things will lead them" but because of him as a human being, his behaviours and personal hygiene.

I have great respect for his thoughts and ideas, and his steadfastness in following his own rules/guidelines, but I don't like him. If he were to look more the part I would have an easier time telling people about his ideas and thoughts without having to worry about people asking "Is that the guy that eats stuff he pulls from his feet?". His outward appearance influences the way people see him, the way people treat him and how much they value his ideas and how seriously they take them.

That is unfortunately true for anyone in almost any situation.

I think manners, and not eating dead skin in front of an audience, is not incompatible with having foresight.

But being maladapted in other ways might well be part of being "prophetic". Prescience, it appears, has a price.

Too bad people are shallow enough to regard matters of hygiene and mannerisms on the same level as having the uncanny ability to foretell what will happen. When will people learn to just see through that, ignore that... People can be weird and still have something substantial to say.