It really depends how big this website is.

Re-creating an existing website using any technology of choice is fairly easy for small websites. The real work in website development is in the initial designs not follow up amendments.

[ Digression - I have spent a few days now working on an IOS app. I have little to show for it because the problem is with designing it in the first place. It will spring into existence when I feel confident about design issues ].

I suspect that most clients wanted to manage their websites do so for cost reasons.

I only produce small websites and I charge nominal amounts for small changes.

Once websites get to be sizeable (whatever that is) it's another matter entirely. I think the management of large websites is more suitable for CMS based systems than static website tools.