Sure it is an accurate analogy.
Just as there was no requirement that Europeans all die off when Americans branched off and differentiated from them in language and culture; there is no requirement that a parent species all die off when a daughter species branches off and differentiates from them in DNA and morphology.
So one day momma “common apelike ancester” gives birth to “uncommon not-so-apelike descendent” Boy George and cousin momma “common apelike ancester” gives birth to “uncommon not-so-apelike descendent” Girl Anna and Boy George and Girl Anna hook up, migrate over the pond, and the rest is history. Uh huh.
Its a bad analogy. Its like suggesting that if we bring some african chimps to an American zoo, then we shouldnt find chimps in Africa anymore. Silly analogy.