Can "using the wrong equations" explain gravitational lensing effects appearing apparently out of the void? The Bullet Cluster is a famous example referred to i

Can "using the wrong equations" explain gravitational lensing effects appearing apparently out of the void? The Bullet Cluster is a famous example referred to in this comment thread, but it's far from the only example. As a non-physicist, observed dark matter gravitational lensing really points to "there's more gravity than we expect" rather than "gravity works differently than we thought" for me.