past simple or present perfect

[Mrxkms]

Complete the sentences with the correct tense of the verbs in brackets. (past simple or present perfect ) .
1- Gibran Khalil Gibran …….. (illustrate) lots of his books. In the 1960s his book, the Prophet ……… ( become) a countercultural guide .
2- William Shakespeare ……………. ( write ) Romeo and Juliet, one of the most famous tragic plays in history. He also …………… (act) in the Globe Theatre in London.
The suggested answers for the above mentioned sentences are
1-has illustrated / became
2-wrote / acted
Why did we use the present perfect in the first one, while we used the past simple in the second one? Although the two sentences are similar and I cant find any difference between them at all.
By the way I read these sentences in grammar section in an English book

[Mister Micawber]

.
The present perfect in #1 suggests to me that Kahlil Gibran is still alive, so that he may illustrate more books in the future. He died, of course, in 1931, so presumably the sentence is from an old source.
.
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Native English teacher at Mister Micawber's

[Mrxkms]

thank you very much Mister