One of the big ideas about magic in his universe isn’t just that the wizards are useless but that using magic is more trouble then it’s worth. It creates all sorts of left over magic residue that can build up to a myriad of effects.
We see the wizards preform powerful spells, showing that they can do have power and do have a certain degree of knowledge, but rather choose not to.
The duty of the wizards is more to make sure no one preforming magic willy nilly and to prevent people from making sorcerers.
philthi@lemmy.world 3 days ago
The wizards series of the discworld books are by far my favourite, but for exactly the reason you’ve set out. (Similarly with the witches)
The dialogue between the faculty is so believable and so stupifyingly inane and political that it’s hard to say that anything is more probable.
Anyone actually interested in how magic works gets ignored and all that really matters is where the next good meal is coming from.
Just one of the countless reasons that Terry pratchett is a gem of an author.