It's easy for someone who already knows it as has practiced it, as opposed to someone who doesn't know and will probably fail.
It's not as niche as rocket science, but still, it's better suited for those who have already done it and are knowledgeable than for old joes.
Still, it doesn't hurt to at least ATTEMPT to make something yourself, doesn't mean you HAVE to but it's still nice, if you can't, then it would be ok to ask someone else or request it to a developer