> HTML is for devs. They're the ones that deal with it.
As devs, we can view this html through a browser and use in-browser dev tools to view the associated CSS. There's no need to explain the style in the HTML.
You can still do that when you use utility classes. The benefit is that now you have a guarantee that you can drop a view anywhere in the application and have it render the same. I can restructure the HTML without worrying that I broke styling in an edge case.