Most of the folks in the dark matter world are pretty straight up with the fact that it’s basically fudge factor. They did the math on movement and gravity and how much stuff that should mean is out there. And compared that with how much stuff is out there. And came up short, so they put in something to get the T account to balance. Dark matter is basically just a place holder, they’re hoping to find it as actually something, or figure out what went wrong with their math.
Most of the folks in the dark matter world are pretty straight up with the fact that it’s basically fudge factor.