Yeah it can certainly cause problems, it's just not ADHD.
ADHD doesn't even really mean short attention spans, it's more of the inability to willingly direct attention. It's the same way people incorrectly use "OCD" to mean liking things clean and/or orderly.
I have ADHD and I've had times where I've done the same thing for 14 hours straight (even forgetting to eat) when my brain decides it wants to latch onto that thing. You just need to be sufficiently stimulated, hence why stimulants can work as a treatment.
Seriously, fuck HDMI. I just recently learned they've blocked AMD's open source driver from being able to implement HDMI 2.1 meaning AMD GPUs are currently limited to 4K@60Hz over HDMI on Linux.