Comment by thicknavyrain

Everyone always misses the corollary to this "groupthink is why we have dark matter" theory which is that academics are very heavily incentivized to try and overturn conventional dark matter because it would be an absolute career-maker to have a credible alternative (and get credit for upturning a widely accepted theory). And in fact lots of people have tried various MOND theories etc but the reason Lambda-CDM persists for so long is because it still fits the data the best.