Well for starters, those are different folders because they mean different things.
If you’re ever trying to figure out where a binary is located, `which` and `whereis` will do that for you. Also programs will list in their `man` page where config files can be set etc, and sometimes they allow multiple options.
But yes, your inability to search anything up or to understand the basics of Unix constitute a complete design failure.
But yes, your inability to search anything up or to understand the basics of Unix constitute a complete design failure.