When you google SciFi it says....
"Science fiction is a genre of speculative fiction, which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel universes, and extraterrestrial life"
I know they say 'imaginative' and 'typically' so it covers everything but most great sci-fi is way more deep than that...it often deals with humanity, romantic relationships, life struggles etc...I think when someone hears you're a sci-fi fan...they often don't get this part of it...