The bias in favor of "dark matter" is a strong example of why academic physics is corrupt. There is absolutely no astrophysical evidence for dark matter, only gravitational anomalies of regular matter, yet significant money has been funded into it for decades, at the expense of ignoring other simpler satisfactory theories. The alternate theories have been prematurely rejected on false grounds without giving them sufficient attention or effort in their development.
I'm assuming it means rejected "without giving them sufficient attention or effort in their development," as stated in the rest of the sentence. What do you think "prematurely" means?