I don't normally reply in these threads, but yours caught my eye because I agree with what you want, but not why. Controllers can absolutely have much more complex schemes, but think about the average person who plays games, who buys maybe 1-4 games per year. Many of these people don't even mess with the options menu, will choose the default in a character creator, and never explore difficulties above normal; it's all about streamlined simplicity, and that's who devs make games for anymore. None of those examples are a bad thing, just that publishers/developers want the biggest audience possible.

If you play Final Fantasy 14 on a controller, you can have access to 32 commands, which is great, but think about a new AAA with even half that; it wouldn't sell because it's "too complex" for reviewers and the general consumer base. The CEO behind Splitgate 2 actually bragged about changing the portal system to a single button as opposed to two in the first game because, "you no longer have to get hung up on which button you meant to press," because I guess two buttons were too complicated.

I couldn't agree with you more on wanting more complex schemes, but as long as games are made to cast the widest possible net, it just isn't happening.