In the real world I much prefer double-tab and two-finger tap to zoom in and out. You don't get quite the same level of "accuracy" as you do with pinch, but precise zoom is largely useless on phone/tablets anyway.
For example, when driving nails, in theory it would be great if you could just push them into the wood but in real life a hammer turns out to be handier.
BTW, not sure about ios but in android you can turn the +/- zoom buttons back on in labs.
I mean, I understand the basis of this argument but pinch-to-zoom doesn't actually map to anything we do in the real world.