Just in the last few months, it seems like everyone who is doing content creation on youtube (etc.) is holding a tiny mic up, in the frame of the camera.
I get that mics are needed, but a good desk mic or a headset or whatever else you might imagine is just as good acoustically, and far less distracting. And they were all in use up until a few months ago.
Is this just a fashion trend?
This. Any time you’re not sitting at a desk/studio you need some kind of mic. And these new wireless mics work well. Now people are opting to not buy/use the big studio mics because the wireless ones work good enough and go anywhere.