not sure if I agree that having AP ensures that learning music will be easy. at least for contemporary western music, identifying and producing a pitch is a nearly useless skill compared to identifying and producing intervals (relative pitch)
Pretty much anyone who has absolute pitch has relative pitch.
That's great, but it's the absolute pitch that's not as useful
Not easy, but less difficult. Not at all useless. When I've forgotten how to play a melody and don't have the sheet music I ask my wife which notes are wrong and in a matter of seconds she has me back on track. This is something that might take me so long I just give up and practice a different song. She can also listen to any song and instantly transcribe chords and melody for me. That's a huge time saver in learning a song. One which I don't lean on very often because I want to develop my own skills. But her ear enables her to learn and play songs far more quickly than me.
It’s hard to deny how useful AP is for people who transcribe music.