Is it normal to not understand the lyrics?

I've listened to Weezer's first 2 albums recently and have heard a few other songs outside of that. The thing I have noticed most strongly is that most of the time I can't understand the words at all. I think part of this may be that the singing is quieter than the instruments, but I'm not sure that it's the only reason.

Yes, English is my native language, so it's not that. I can usually understand the words to most songs.

Also, yes I can just check what thr lyrics are, but sometimes I cant do that when I'm listening to music (for example, when I'm driving)

Is that common or am I just missing something?