That poster didn’t make the claim either. Their claim was that MIT didn’t accept many, not any. I think the point was valid, and you certainly haven’t refuted it.
It seems you are inferring intentions here to suit your position, but I don’t think it is the supposed “opponents of standardized testing” (that’s not how I would describe myself) who are manipulating what MIT has done here.
Speaking for myself only, I am just going by what MIT has indicated. MIT has been abundantly clear that its decision to require tests has nothing do do with their admissions results of the past couple years. Here is @MITChris directly addressing the issue on the MIT reinstates ACT/SAT test requirement thread:
So according to @MITChris, the decision was nothing about the admits from the past few years. If you think he has it wrong, you should contact him and correct him.