It's still way more than 3 > different variables are being to fit each one in isolation. For the big picture, phenomena that get "explained" by dark matter ar

It's still way more than 3 > different variables are being to fit each one in isolation. For the big picture, phenomena that get "explained" by dark matter are absolutely being fit by different individual variables. For example, the ratio of dark matter to baryonic matter is different between clusters and individual galaxies by an order of magnitude. I recall the DMD for CMB is also different but I can't substantiate that memory quickly In the small, too, there are many galaxies where we have no idea what dynamical situation led them to have the dark matter content they exhibit.