How to set to open folder with enter in finder?
Any person new to Apple and Mac would find lot of things un-intuitive or just forced on the user, w/o any options to change it.
Or it might be that just many of us had their first experiences on Win/Linux systems.

But just found this plugin to finder XtraFinder which among lot of other options allows you to ENTER/RETURN to open a file.

Feeling a lot relieved now! Hope it helps.