While refridgerator mother theory, taken its original form, is archaic, the belief that there are no psychogenic factors in autism is equally ignorant and goes unchallanged, with severe consequences.
There is at least some consistent evidence for at least some psychogenic factors:
10.1001/jamapediatrics.2020.0230
10.1001/jamapediatrics.2021.5778
10.1016/j.ridd.2017.10.022
RMT at least made parents do their job and challanged the hyper-individualist culture of American parenting itself.
The complete denial of psychogenic factors in autism, by contrast, has lead to eugenics, child murder (IE Kelli Stapleton, JRC), the gutting of the healthcare system by RFK Jr., and even more abuse; absolute biogenesis is no different from other reactionary idpols, existing to excuse and, in fact, encourage abuse while sacrificing village even further.
For all his faults, his framework was at least heading in the right direction, as opposed to Lovaas or Rimland.