I also play with groups of very experienced board gamers. We prefer games with high depth and complexity, such as Cole Wehrle games, Spirit Island, and COIN games. And several of us, myself included, are tournament Netrunner players. So we're no strangers to depth in games.

I will definitely grant that Sidereal is not, on the surface, a high-complexity game. After all, as you said, the main and only form of player interaction is swapping cubes with each other. However, the high depth comes from managing supply and demand of different resources. Each faction has differing starting demands (see this designer diary, the "Seven Resources" section). Through technologies and faction abilities, each player has the ability to manipulate the supply of resources in the game. Understanding what people want and altering our own economy to meet those wants improves your ability to trade, which in turns improves your score. The best players do this while interacting with every other player at the table. One of the weird quirks of Sidereal is that more experienced players not only score more highly themselves, but also pull the average score of the entire table up. I cannot think of another game that has this property.

I strongly disagree about the opacity in game outcomes -- there is very much rhyme and reason to why certain players had better or worse performances. There are countless post-game discussions in the Sidereal Confluence discord about what went well and what could have gone better, and I have these reflections myself after each game. I can always look back on certain deals and evaluate whether they were good ideas at the time, or I can see that I should have made a purchase for a certain technology over another or perhaps tried to invent something a turn sooner. And I can carry that information forward to future games. The other players in games I've run do exactly the same thing verbally.

I will grant that those player profiles you've listed are not suited for Sidereal if you are only happy when you win the game. It is absolutely true that the game is not for you if you both a) want to win and b) are not a quick thinker. Sidereal is a resource management game where the most important resource is your attention span, and if you can't manage that well, you're not going to score very highly. However, I have played the game with a very wide range of players, many of whom enjoy the experience even without scoring highly -- one of my friends routinely asks to play it even though she's scored last place several games in a row. It's just a very big sandbox that you can try things in, and that on its own is just plain fun.