What was the security warning about? And what was required of me?
To me this is kind of the important part in combination with this: "when security messages interrupted a task". As I have learned from my parents, you don't go haphazardly interrupting people with some kind of nonsense. If you do, you can expect to be ignored or be told off. If a security warning is about to inform me that a scheduled scan will start in an hour, or a patch will be downloaded. I'll ignore it. It doesn't require my attention at this time and I was busy with something. It interrupted me with nonsense so it's annoying me and I clicked it away. Another point of contention is if the message requires me to do something like restarting the system. If I'm in the process of doing something that needs up time (be it from watching a video, to copying files), I will complete that task first. Task prioritization is key here and interrupting me is again, annoying. Even if it does want me to do something.
So yeah, I get where these figures come from. Not at all astounding to me.