That's too bad. I don't really use it for anything else other than watching TV shows or the occasional movie.
But I'll have to agree with your family members on the pointlessness part. It really does get addicting, and it isn't a kid program either. There is a kids section, but it's very easy to sin around there. Which is also why my dad set a passcode for getting into Netflix. No secret Stranger Things for me I guess...
It's not completely useless though. There are some really interesting things in there, good things too. But it's pointless again in the sense that you can always find those things elsewhere. So I guess you can say that I use Netflix for convenience rather than watching whatever.