He gets high GOE because his spins and jumps and steps are all performed on a high level. Tell me who jumps more beautifully than Yuzuru at the moment?
Han Yan's jumps are long but not as high, and he's been injured/ill so many times this season. Javi's jumps are powerful but he rotates slower. Voronov's jumps are high but he telegraphs his jumps a lot. Kovtun's jumps are high but not easy to the eyes at all. And as some posters who has analyzed all top skaters' jump recently in the reference forum, Yuzuru's jumps indeed are the highest in average (same height in quads as Javi who people assumes to have more power, some triples are higher). And let's not forget about Yuzuru's landing when he's on.
Not to mention his spins aren't just so so like Javi. He has excellent spins, fast and well-centered most of the time.
Regard of PCS, among the top men at GPF, people who have seen him live confirmed that he has great ice coverage, with lightness and beautiful stroking sound (report from Twitter and many posters). Yes his posture is not ideal but people are exaggerating a lot, he doesn't slouch all the time, he actually has good positions in jumps, spins and steps... As some Japanese documentary has pointed out, his upper body's angle was 45 degree when existing his jump, the smallest among all medalists in Sochi. So to say him has terrible posture is just wrong.
People can like his artistry or dislike, it depends on their taste I have no opinion, but statistic and comments from people who have watched him live don't lie. Some posters have showed article/research saying that Yuzuru's statistics (like speed, ice coverage...) are only behind Patrick Chan. And that was from last season. This season he has improved A LOT. And I am not even taking into account his terrible condition at all.