Brah, you living in da past. When Arnel met Steve at the music awards ceremony Steve congratulated Arnel for 10 years of fantastic singing. "Perry, who had nothing but warm words for him for keeping Journey's music alive. "
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In his acceptance speech, Perry said: "I must give a complete shoutout to someone who sings his heart out every night, and it's Arnel Pineda. Where are you, Arnel? Arnel, I love you." 
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Ref: http://news.abs-cbn.com/entertainment/04/08/17/look-arnel-pineda-meets-journeys-steve-perry-for-first-time
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Steve willfully left Journey, he could have come back, decided not to.
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Lets not forget Journey's drummer is not the original either.