Why is the NamedSize of a Label's FontSize not equal to the literal size?

[CodingOctocat]

I'm curious why MAUI's template Styles.xaml doesn't use NamedSize(Header, Medium, Small, etc...) , but instead uses a literal size of 14 as the default font size for Label. Also I found that the NamedSize of a Label's FontSize is not visually equal to the literal size! NamedSize runs with a non-integer font size instead of the usual 14, 18, 22.

https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/Compatibility/Android/FontNamedSizeService.cs#L10