I've pushed back against standardized testing at certain points of my life, and I don't think this comment even remotely summarizes my views.
If anything, I would say that my views are the opposite -- homogenization creates a lack of differentiation around skill and aptitude based on questionable science (and sometimes outright pseudoscience) and often leads to an oversimplification of human intelligence in general. It always feels very strange to me that people trying to compress aptitude into a single number say that they're defending differentiation or diversity of talent.
MIT's findings here don't really change my view of the value of SATs, although the findings are interesting and I think they're worth looking into further. I'm not sure "they're more predictive than GPAs" is the glowing recommendation that SAT proponents think it is. You can agree or disagree with me on that point, I'm not here to debate the entire idea of testing or IQ or whatever -- I just want to point out the above comment is a pretty big oversimplification and (in my mind) a borderline complete misrepresentation (I assume unintentionally) of what people like me believe. I can only speak for myself though, maybe there are people out there who do hate the idea of excellence.