Honestly, I've gone into the Journey Guide and replayed most of the old events
me too.
just because I remember the thrill of facing them the first time.
I've also replayed them because I mentor newer players & I need to remember the event the strategies in order to give good advice. While I have a good memory, it's obviously better if I take advantage of the opportunity to remind myself of the dynamics by replaying it. I actually really like being able to replay for this reason, because a lot of what makes the game work for me is the social collaboration (not following a step-by-step recipe where I feel like I'm not playing, or where I dictate to others how to play, but being able to hash things out & help each other).
Playing an event that I've already seen in guide video isn't the same.
Agreed.
It's definitely more fun to figure things out for oneself. While being able to replay (for various reasons) is nice and I want to keep that option, it's not a substitute for playing it yourself the first time.