hinese writing objectively sucks. The alphabet is a superior invention, and so is writing horizontally (field of view is wider). How obvious is an alphabet though? Apparently it’s not!
All existing alphabet (except some designed fairly recently and possibly meroitic) seem to lineate to the proto-sinaitic alphabet. There is no sign of independent discovery. Scripts as distant as Khmer and Runic share a common ancester. It probably means that over periods of centuries, languages had no alphabet, until they came in contact with an offspring of the proto sinaic alphabet.
Inventing the alphabet was apparently much harder than inventing writing after all.