Earlier quoted context omitted.
Even after decades of using macOS I still cannot wrap my head around the fact that Finder has no single button shortcut for opening a file - the most common operation a file manager should do. It’s Cmd+O, and it cannot be changed to anything sane like Enter key.
You can remap it to any shortcut you want (as long as it has a modifier key in it)
Why on Earth is this a requirement? When you're navigating through Finder using keyboard, it's very inconvenient to use two keypresses to perform a very basic operation. Using Enter to open a file is how every file manager on every operating system works except Finder. Why would Enter key be hardcoded to a file rename operation instead?
It is a typical Apple behaviour of doing things differently from the rest of the world just for the sake of it, even when it's detrimental to the user experience.