It is extremely common for people to infantilize childless people and act like they are incapable of being functioning adults because they never had children. This belief is much more common among boomers and other older people who never lived on their own. They went from living with their parents to living with their husband and can't imagine any intermediary stage.
There is something so empowering about being able to take care of yourself and all your needs without relying on a partner, a parent, or anybody else. It's totally okay if you don't want to do that forever, but doing it for a season is really good for personal growth.