[marcinjachymiak]

Yes, that is the main argument and I agree with it. But bundling it with EA is just inaccurate.

Longtermism seems to me like one of many deadends that utilitarianism takes you down if you embrace it and only it as your moral theory.

A little bit of utilitarian thinking can be fine when you have another theory to tell you the "why". That's why I don't have any problems with EA which is usually quite concrete