Honestly, I think this just doesn't make sense (and I have no ties with EA whatsoever). You've written it nicely, but it just doesn't follow. It makes no sense to judge a movement by its worst possible member, and it doesn't make sense to say that the overall philosophy doesn't work when one guy obviously didn't follow the philosophy and then had it explode in his face.
The argument, to me, feels akin to "well, vegetarians think they're morally superior, because they don't kill animals, but just look at PETA! PETA does this horrible stuff where they kill animals in shelters[1]." And then perhaps follow it up with "this shows the weaknesses of a moral philosophy that centers around saving animals lives..." but it doesn't. PETA doing shady stuff doesn't illustrate any philosophical failures any more than SBF doing shady stuff. If you want to address the philosophical failures of EA, you may, but I don't see any of that in your comment.
> but it immediately and prominently shifts to arguing about how EAs are great people who will donate their kidneys to strangers
Is this so surprising? Look at the immediate and negative response that EA receives today. Of course any mention of EA would want to be brought with a caveat that "hey, EAs do some good things too, you know - we're not all SBF!"
But I question if your interpretation of the article is even correct. Simply Ctrl-F "effectiv" gives a bunch of hits in section IV, and then no more hits for the rest of the article, except for a stray one in section VII, which was essentially my impression when reading the first time. He talked about it enough to address the controversy, then moved on. Like a reasonable person, not an author of "promotional religious material".
[1]: Actually true, btw (not that it has any bearing on vegetarianism): https://www.theatlantic.com/health/archive/2012/03/petas-ter...