I understand your felling but this is just like most other things in life. Take TV for example. Most people watch stupid shows that actually make them dumber instead of watching interesting stuff like documentaries for example. In the end it's all relative. Everyone has their own taste. This just means that the majority of people likes those kind of posts.

With time there will be established communities dedicated to certain kind of topics and maybe those will get more exposure than now.

Having more upvotes doesn't mean the content you posted isn't good. It just means whoever holds influence and upvotes has either missed it or simply isn't of their liking. Simple as that!