Netlify is for one use case - front end developers deploying websites.

That means things like automatic asset compression and minification, feature support for things you’d normally need to setup a backend server for (login, form capture, etc), automatic SSL certs, CMS, etc.

Yes, most of their features can be replicated with other tools, but the point of Netlify is that you don’t need to with them, because they understand your perspective (hosting a static website as a front end developer) and they handle things for you.