For a newbie, those subtle adjustments are often the difference between wifi working and not working. An experienced user will figure it out, but it can take forever.
The RPi isn't the cheapest or the fastest or the smallest or the most featurific board in its niche. But it's got great value as a standard platform, which means if you've got a problem, chances are someone else had it before and maybe wrote up a solution.
Of course it all breaks down once you start using external hardware, which I found out when I tried to get my USB wifi stick running (unsuccessfully). But at least you can google "raspberry pi <manufacturer> <model>" and get advice specific to you.