I don't think that's why Courtland is growing a community. I think he is growing the community because he believe's it is the best way he can help indie founders be more successful right now.
Also, please stop spreading untruths. It takes one click to get from the homepage to a list of all interviews ranked in descending chronological order. With some pretty awesome filters as well.
FWIW, if you're reading this comment and were thinking about checking out Indie Hackers then don't let these comments put you off. There is a pretty large group of us on Indie Hackers who have built (and are building) successful software businesses, the average quality of discussions and answers is higher than on HN (albeit more focussed on the topic of bootstrapping and with a narrower quality range), and it is honestly the most positive, supportive community I've ever found online.