It's true that learning an alphabet shouldn't take as long as learning the entire language. However, there's still a difference with cuneiform:
All of the examples you mentioned are derivatives of the Phoenician alphabet, which have around 20 to 30 characters each. Even with case sensitiveness and diacritics, I think they still add up to under a hundred characters.
Cuneiform character sets are in the order of magnitude of the several hundreds or even thousands, depending on the language[1], so I imagine that the experience is closer to learning to read Chinese or Japanese and less like Hebrew and Greek.
That being said, I've never tried to learn neither cuneiform or hanzi, so I'm just guessing based on the number of characters.
All of the examples you mentioned are derivatives of the Phoenician alphabet, which have around 20 to 30 characters each. Even with case sensitiveness and diacritics, I think they still add up to under a hundred characters.
Cuneiform character sets are in the order of magnitude of the several hundreds or even thousands, depending on the language[1], so I imagine that the experience is closer to learning to read Chinese or Japanese and less like Hebrew and Greek.
That being said, I've never tried to learn neither cuneiform or hanzi, so I'm just guessing based on the number of characters.
[1] https://en.wikipedia.org/wiki/Cuneiform#Sign_inventories