There’s a balance of course, but I know a few people who go too far into the “save everything” category. They are slaving away in their 20s and 30s, prime time for exploration and fun, for a retirement when they are older and have other responsibilities.
I have a family member who had a serious health scare when she was younger, and still lurks over her head. It’s really a different perspective: why have no fun now saving for a day that might never come?
Of course, you do need to save something, because retirement will hopefully come. Balance is everything.