It amazing some people want to live in a bubble
When you are married there are little things like the toilet seat up or down that can really bug people and there are big issues like Money, kids, and other issues not for this forum.
Some of these issues are solveable and some are more intractable (Money is always the toughest)
To say they dont exist is to live in a vaccuum, you try to make them work and do the best you can.