I’ve noticed that on a lot of AIBU threads, when someone raises something that’s bothering them, there’s often a reply along the lines of:
“This is such a non-problem. If this is all you’ve got to worry about in life, you’re very lucky.”
A lot of AIBU is literally about everyday dilemmas. Sometimes it is to sanity-check irritating situations.
Also, people don’t usually list everything else that might be going on in their lives before posting. Someone can be dealing with a lot and still want to talk about one specific issue.