system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] How do Wands work?

Why do you have to say the name of the spell for the spell to be cast? How and why do Wands choose their masters?


And how come Hagrid was able to cast the fire to light the fire place without saying the spell?
gpt
Wands and spells are like training wheels or a barrel of a gun respectively. They make sure the spell is the one you wanted and direct it in the most efficient way possible. That being said, if you're a good enough wizard you don't have to worry about them. Hagrid is just skilled enough to  not need a say a spell to cast what he wants.

Wands are almost living entities themselves, being made of magic items like unicorn hair or phoenix feathers. They are like a wizards closest ally, knowing what he wants to do and helping them achieve the task at hand. If you use a wand that doesn't think you deserve it it won't be very useful, even detrimental to the user.