Field recording and audio engineering people might have audio recording equipment that use SD cards.
Software developers working with Raspberry Pi might appreciate having the SD slot built in.
And also, just because the photogs don’t need SD don’t mean that people in other professions never need to transfer photos from SD.
Probably a lot of journalists have cameras with SD cards. You can’t always bring a photographer for every article that you write.
And I say that as someone who uses CF in his 5D4 (with SD for overflow, or simultaneous writing for more critical events).
[EDIT: though, of course, if you're already hauling around a laptop and an SLR camera system, it's no big deal to keep an external card reader in your bag too...]