Eh, I'd say it's a valid use case as any.

Maybe someone just didn't have the time confidence or interest to learn CSS. Maybe it's as simple as doing what you want, doing what you can afford to do, etc.

What I don't like is the negative framing of this choice. Bad things will be built, regardless of the underlying tools. Grandparent claimed that using Frameworks results in bad practices. I claim that shaming people and questioning their choices (whether they made them consciously or unconsciously) is a bad practice.