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I don't have any problem with the existence of dark matter. But one way that it's different from all those other things is that we can generate them or observe

I don't have any problem with the existence of dark matter. But one way that it's different from all those other things is that we can generate them or observe them locally. We have landed on asteroids. Heat, gamma rays, electricity, neutrinos, gases, all can be made in labs. Yet if there are dark matter particles, we haven't found them yet. Perhaps dark matter is just a victim of its own success. If it were just referred to as non-baryonic matter of a currently unknown construction instead of a catchy name like dark matter, perhaps few people would care.

AnIdiotOnTheNet 5y ago
It's obvious why though: most of the things in the universe can be observed using the electromagnetic spectrum, but dark matter doesn't interact with that. Instead we have to use gravitation, a force some 36 orders of magnitude weaker. That means we pretty much only observe it when the scale is large enough that we can notice its effects, which means it'll be very hard to observe on any kind of local scale.