In principle, yes. However, there is not only evidence for dark matter from galaxy rotation curves but also from large scale structure simulations and especially from the CMB. The interesting thing is, the CMB observations, which react to the number of particles in the standard model, agree rather well with rotation curves. (And IIRC there is also a way to disentangle structure formation from simple gravitational interactions, so there are "2 and a half" independent observations which indicate dark matter or something that closely resembles dark matter.