@tpr I do not really think the Sicilian is in any way boring, but if you can say you are able to play the Molotov-Lollipop-opening everyone is going to be like: Whoah, what does it look like, how exciting!
Currently I am aiming to improve my endgame technique, but I enjoy watching the videos of GM Akobian on youtube as well where I met some openings I don't usually play or face, like d-pawn-openings or the Dutch defense. Once I hear why one wants to play his bishop out first before playing e3 I improve my understanding of chess, yes. It's just a petite mosaique, but yes, I think it helps even if I maybe play some other openings or play completely out of theory (for example it should help if you play chess960).