Yes, the reasoning in the linked posts implies that deep inside, humans should be as altruistic as you say.
This is not what the posts are about, even if this works as one of the conclusions. The idea that urges and goals should be distinguished, for example, doesn't say what your urges or goals should be, it stands separately on its own. There are many such results, and ideas such as altruism or importance of FAI are only few among them. Do these ideas demonstrate comparatively more visible measurable effect than the other ideas?
I have several questions related to this:
If you visit any Less Wrong page for the first time in a cookies-free browsing mode, you'll see this message for new users:
Here are the worst violators I see on that about page:
And on the sequences page:
This seems obviously false to me.
These may not seem like cultish statements to you, but keep in mind that you are one of the ones who decided to stick around. The typical mind fallacy may be at work. Clearly there is some population that thinks Less Wrong seems cultish, as evidenced by Google's autocomplete, and these look like good candidates for things that makes them think this.
We can fix this stuff easily, since they're both wiki pages, but I thought they were examples worth discussing.
In general, I think we could stand more community effort being put into improving our about page, which you can do now here. It's not that visible to veteran users, but it is very visible to newcomers. Note that it looks as though you'll have to click the little "Force reload from wiki" button on the about page itself for your changes to be published.