Just as well their parents didn't feel that way about them when they were growing up.
And you know this because?
I should imagine a good many of the posters who post this are the children of parents who without being outright abusive did make them feel they were a burden.
I am actually fine with my parents and never felt a burden to them, but I would not want to live with them because I think they would be uncomfortable about a good many things about the way we live:
they are teetotallers so seeing us drink even a small glass of wine on a Friday evening would upset them
they would be deeply shocked if they heard me utter even the mildest of swear words
they would be shocked it they overheard some of the very open discussions I have with my (adult) children on matters like sex
they would be shocked and uncomfortable with the television being on several evenings a week for frivolous things like detective series- in fact, they would be uncomfortable with any violence that wasn't Shakespeare (though my mother also gets upset when Shakespeare is not in traditional costume)
my mother also gets very unhappy when she overhears anyone discussing politics so we'd not be able to do that while she was awake
they wouldn't like our cooking, particularly not as we do a lot of vegetarian
They are lovely, lovely people, but they would be unhappy in my home. Ds and I can just about get through 6 weeks summer holidays spent together because we keep a check list of things we mustn't do or say and ds is extremely good-natured. For 6 weeks a year.