You know, when people say computer they aren't talking about a phone in 98% of cases so yes most casual users of a computer are web browser for everything people and the second part is about specialty use cases and saying entertainment is for kids. So I'm not sure what your point is.

For a casual user, Linux is fine. I'm not saying everyone has to use it, I'm saying it works fine. The lie that gets spread that Linux can't do what a casual user needs is a blatant lie.