Here's why:
* Silent e doesn't make any sound. It's there to change the sound of the vowel before it.
* Short vowel e makes the sound you hear in words like "bed," "pen," or "set."
Example:
* "hate" - The "e" at the end is silent. The "a" makes the long "a" sound.
* "bet" - The "e" is a short vowel sound.
Think of it this way:
* A silent e acts like a "magic letter" that makes the vowel before it say its name.
* A short vowel e is just a regular vowel that makes its short sound.
So, the silent e is a different concept from a short vowel e.