I mean, Caroline Ellison herself is the one who said her relationship goals (which was to a large degree coterminus with company structure) was "best characterized as something like 'imperial Chinese harem'" no? It's not Time "orientalizing", it's one particular fucked up polycule.
Polyamory takes on a distinctly awful flavor when imported into EA (and before that Rationalist, which I would assume is where it reached EA from) communities. I would assume abuse and codependence before healthy relationships in these cases, because frankly I see 99% of this movement is at best emotionally immature.
I also think this is really a non-issue, millennials and later mostly don't care at all and the people who don't like them aren't going to be convinced by anything ever, let alone some more carefully-crafted magazine article.
But, of course, what he didn't do was get the consent of his depositors to have their deposits rerouted and gambled with in the way that he did. Even if he had been right, if he had been able to ride the wave and cryptocurrency became everything he thought it could be - his actions were legally found to be fraudulent.
In terms of a broader pattern with regards to consent and power dynamics, there's another inescapable data point of the EA movement's problems with internally handling sexual harassment allegations - I won't link to the time.com article on the EA movement, as it horrifyingly orientalizes and conflates polyamory with harassment, but assuming that the article's quotes from primary sources are accurate, it suggests a culture of protection for those who would abuse their power.
I think that the EA community needs to grapple with the notion that just because one believes a certain pathway to be optimal, it does not absolve them of the need to gather explicit consent, given freely, with information discrepancies and power dynamics taken into account, from those who would be impacted. Optimization under constraints can still be optimization, and people's freedom to choose the extent to which they participate is the most important constraint of all.