It's not that their imagination is small, it's that the designers of a language as popular as C# have to be cautious: not only they must not break tons of existing code, but they must also not introduce features that end up not being used because they're poorly designed (but still have to be supported for the same backwards compatibility reasons).

Thus it's not uncommon for C# to add things like these: they are small and easily defined, solve a specific but very common use case, and are much easier to put on life support in the future if something better comes along. It's not "neat", but practicality beats purity.