It's pretty easy to put your hands on the board at natural angles and be like "yeah I can type like this," but if you actually record yourself typing naturally at least one hand will end up turned 'outward' some. It's something everyone is used to and it's not a huge deal if you're not typing a bunch all day, but the alice style boards let you actually keep that "natural" position a lot more closely even when not thinking about it. It's kinda like getting a chair with good lumbar support.