system
Given the following post, respond as if you're commenting on Reddit:
human
[The Hobbit] How powerful was Radagast?

So it was shown that Radagast could at least hold his own aganist one of the nazgul, even if he was the weakest of the wizards he still must be very powerful. Why wouldn't Gandalf want him to come with him into dol guldur? I understand he wanted him to go send for help, but couldn't he have sent a message though a moth or other means? Surely 2 wizards is better than one.
gpt
In his pure form, Radagast is a powerful Maia, a being of awesome, reality warping power compared to an angel or a minor god. However, once embodied, Radagast's role in shaping the world was to be a gentle and subtle gardener of the woods, and a caretaker of the lesser creatures of Arda (just like Gandalf's role was to inspire and motivate Men, Elves, Dwarves and Hobbits to fight against evil).

If the Radagast were to truely take off the kiddy gloves and go brawling, he would ruin his mission. It was more acceptable for Gandalf to break the rule of non-interference when Men/Elves/Dwarves are not looking, but Radagast did not promise not to interfere, but rather not to harm, so going nuclear on some wraith-ass would violate the spirit of his vow, unless it was strict self-defense or immediate defense of others.