Really? In what world is half the same as 20%? His right front tyre is touching Jenson's left rear. That's less than one fifth of the way along the car.
Yup, he seemed to be looking, but that's not the same as seeing. Even if he had seen, he couldn't expect Lewis to dive into a gap that was only going to be there for nano seconds.
And the normal, dry, racing line IS that close to the wall for some drivers/cars.
Utterly Lewis's fault. If it had been me, I'd have either lifted before contact, gone to the right hand side and tried my luck round the outside of T1 (which gives the inside into T2), or waited a little bit longer in a long race to make my move. No way would I have kept my foot in knowing that the gap was closing that fast. I doubt anyone else on the grid would have done so either.