It's perfectly alright to feel that way towards kpop. I pretty sure the majority of the population who do know about kpop feel exactly the same way you do. If we take a step back, away from the visuals, the fancy MVs, the high quality outfits, the cool dances and the general 'glamour' that surrounds kpop, the fundamental reason why kpop fans like kpop is the music.
What I enjoy about kpop is the experimentalisation. Kpop is very different to your average popular english song (although there are many generic kpop songs in the industry right now) You may have only probably heard of very popular groups such as BTS whose recent releases are quite generic. However, even if you look at a popular group such as BTS and look into a few b-sides (side tracks) or even some of their older songs, you can see the range of different sounds none of which would fit your 'generic' stereotype.
Kpop brings a different sound to the table which many people, including myself, enjoy a lot. Of course, the dances, visuals and MVs are a nice addition but I don't think any of us would be here if we didn't enjoy the music. Also, even if we don't understand the lyrics, they tend to have a deeper meaning which many kpop fans enjoy looking into.
The reason why people are so invested in kpop is the way they are marketed. American singers tend to be very one-faced towards the public, only showing their 'celebrity side'. However, kpop idols are encouraged to show their dorky and fun sides because it makes them more appealing and makes fans feel closer to the group/singer. You watch countless videos of them and you feel like your closer to them as a fan even if you're actually not. You invest a huge amount of time into the group and there is just so much content out there. Fans keep eating up the content as companies produce more and more until it's pretty much an endless cycle and you've been sucked into the world of kpop.