That’s pretty silly … IMHO …
I understand the logic (requires a “hands on” aspect), but then maybe they should offer a wider range of variations (RAM is my major gripe) that makes it not be considered as a customization.
My Advice
If you are buying a computer and not 100% sure (example a GIFT) … DO NOT customize on the web … RAM for instance doesn’t cost any less, when you customize, so you could just buy it separate.
Thoughts?