I am looking at Effective Altruism with interest and I think that the criticism you give here is a bit much. Every ideology is imperfect, just like every type of human endeavor, including science. So, no matter how well intentioned, if an ideology is put into practice, people will die. The more important questions are: how many, and can the ideology learn from its mistakes. I would argue that Marxism fails on both counts (lot of deaths, no ability to adjust) and capitalism succeeds (lives saved are more than lives lost, it adjusts and improves). I think Effective Altruism will ultimately be a force for good. One problem that it does have is that its morality is based on Consequentialism, which is intellectually simple and pure, but needs the wisdom of Virtue Ethics and Deontology to correct when it is in danger of making stupid decisions. For example, Peter Singer, a noted Consequentialist, has come to some silly and dangerous conclusions that have been called out by the disabled. My expectation is that Effective Altruism is not so dogmatic that is would fail to learn from this and become better. This is an opportunity for improvement.