Now compare that to buying a model from Dell or Lenovo, where the current product lineup is already 2-3x the size, the models are sometimes discontinued, sometimes changed significantly between refreshes, often refreshed annually, oftentimes configurable in a meaningful way (1080p non-glossy vs. 1080p privacy screen vs. 4k glossy vs. 4k touch screen), sometimes just available in certain geographical locations and they exhibit more intra-generation manufacturing differences. The chances of finding other folks with your exact same permutation (and same day of the week it was manufactured) of these options are much smaller, so you stand less of a chance of getting something recognized as a fundamental manufacturing issue which should be covered for free by the vendor. Plus, even if you can get repair/replacement for free, you still fear that your specific model has a flaw, so you might only get lucky after having it replaced 2-3 times.
I've seen it happen with Dell and Lenovo where folks sent back brand-new units repeatedly because the first one had overheating issues with the SSD, the second one had really noisy capacitors and the third one had a display cable that wasn't seated correctly. At least with Apple I know that if I'm getting screwed, I'm in the same boat with everyone else ;)