There's nothing wrong with being confined to this solar system. Most of Bova's novels are, and there's a British SF show that it seems nobody knows about but me (since I've never found any other people to discuss it with), called Space Island One. It's about an international group of research scientists who are based on a space station in Earth orbit.
I was thinking of what it means to be a "space opera", for some it seems to mean anything that takes place in space while for others it implies a certain scope of events and setting.
At the risk of being pretentious, I present the link to https://en.wikipedia.org/wiki/Space_opera.