Breaking the boundaries too often has an averse affect on the game, it could spoil the fun for everyone on the table, not make these moments epic anymore and might make the world feel less real.
A way to combat this might be to let characters sacrifice something in order to break the boundaries.
Reference
E. Schea, M. (2018). Sly flourish’s return of the lazy dungeon master. Sly flourish shop
Highlights or timestamps
Return of the Lazy Dungeon Master Highlights
- But only when it’s [breaking the boundaries of the game and its world] awesome, and not if there’s any danger of breaking the game becoming routine.
— ^1328d7 from Return of the Lazy Dungeon Master highlights