I’ve noticed a general sentiment that printing on Linux is (or at least was) extremely cumbersome and difficult. Why is that?
Printing has basically everywhere been annoying. You need(-ed) specific drivers or even apps to make it work and if you have that set up it still can be annoying. And because most of these drivers/apps don’t support Linux printing relied on reverse engineered drivers. Then CUPS came around which made things better. And when apple adopted CUPS for Mac suddenly everyone wanted to support.
If you are really interested check out this episode of destination Linux where it’s discussed in detail.