If you are doing front-end web development then you really need to have some knowledge about accessibility, screen readers, etc. so you don't make simple/common mistakes. More so if you are involved in addressing accessibility issues for customers/your company.
I dunno, color blindness is brought up just as often here IMO.
On the whole I'd say it's a good thing because it means that the various awareness campaigns are working. Better that this kind of stuff is "overdiscussed" than not discussing it at all.
And besides, this focus has some useful side effects. For example, pages designed with screen readers in mind are also that much easier to interact with from scripts and other automation.
