Your idea of there being competition for human relationships is super fascinating. In my own life, there are fun/easy relationships, and there are those which push me to think deeply and differently, for any number of reasons.
In that vein, doesn’t “competition for relationships” necessarily breed egocentrism above all else? The winning relationship will give you what you want, but not what is necessarily true…
In that vein, you might also consider that the commenters you’re replying to may be worth engaging intellectually with more deeply purely based on the fact that they’re presenting divergent views that are uncomfortable.
Based on how we’ve designed AI to date and how you describe it in terms of optimizing for self enjoyment for each individual (and difficult to argue most will choose that for themselves), it’s hard to see a world where AI can push productive conflict the way humans can.
Then again, I might just be a flawed human who doesn’t fully understand the point you are trying to make and is extrapolating from my own biases, flaws, experiences, and the limited sample size I have of your point of view.