Last time the Valar intervened it almost destoyed the world, and from then on they said they wouldn’t intervene. The people of middle earth would have to do it.
Once Sauron was defeated they weren’t intervening in a conflict anymore. Same for Gandalf using just a bit of magic, the Istari were sent to guide, not to use their powers and do it themselves. Gandalf is the only one to cheat and use his magic to help.
Last time the Valar intervened it almost destoyed the world, and from then on they said they wouldn’t intervene. The people of middle earth would have to do it.
Once Sauron was defeated they weren’t intervening in a conflict anymore. Same for Gandalf using just a bit of magic, the Istari were sent to guide, not to use their powers and do it themselves. Gandalf is the only one to cheat and use his magic to help.