I have a hard time accepting that seeing as there is no way to configure system-wide fonts. CMD+scroll-wheel in Chrome doesn't even work properly (you can zoom the entire desktop, but it doesn't scale just the fonts on the website + remember your setting like it does on Linux and Windows machines).
I had to use a Mac for work and found it very difficult on the eyes when using an external monitor. To me this was not just an accessibility issue but THE accessibility issue. The fact that Linux gets this right of all operating systems, but Mac doesn't, speaks volumes to how much Apple actually cares about accessibility IMO.