DM is an orthodoxy. Going against, or even just noticeably straying from, an orthodoxy isn't a happy path and isn't taken by many. DM proponents with their rota

DM is an orthodoxy. Going against, or even just noticeably straying from, an orthodoxy isn't a happy path and isn't taken by many. DM proponents with their rotational speed curve argument even failed to account for difference between real gravitational potential inside the disk, and they use a simple model of a centrally located spherical mass instead. Time dilation is orders of magnitude more complex to account for.