Yes.
Is it worth looking at games with openings you don't play?
Well, you might plays those games eventually, and even if you don't play the opening, there is a lot to be learned from the mid game and end gamed

It's always a good idea to expand your knowledge base, and borrowing tactical ideas from one opening to another isn't against the law, either.

Tactics pop up in different openings, and theme combinations might arise that you can use in other openings.
I do examine traps and certain pawn structures, though general study can also unearth these ideas as well.
Yes, u need to inderstand ideas, plans structures from different openings, there is a lot of overlap and transpositions anyway.

Agreed... good games are worth playing over even if you never intend to use that opening system.
Another point is that there are many cases when middle-game positions converge even though the opening systems were completely different.
Three times in rated games (playing Black) I have reached favorable middle-game positions in the Ruy Lopez Breyer system... an opening that I never play... from games that started with 1. d4 with my opponent playing the London System against my King's Indian Defense.
It's hard to imagine two openings more distinct than the Ruy Lopez and the London System... but the middle-game positions were virtually identical.
Is it worth looking at games with openings you don't play? I was looking at a few interesting games with openings that I never play so I was wondering if it was worth the time.