Actually "since" and "from" are kind of similar though they have a difference in meaning along with a distinct taste separating them. That means sometimes a language is not about why this and why not that, it's about which one is sounding better in that particular case. But in this case they also have a difference in meaning, "since" is used whenever the case had started and it's still in a intermediate period. So it's the time between two particular incidents or times. However "from" is used for strict identification of time or place, it doesn't give you the intermediate essence or meaning of the sentence.
Demietra95
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