But looking at the stats of the normal and enchanted weapons it is obvious that the majority of the enchanted weapons are simply better than their normal existent.
I think "better" is a pretty situational term in this case.
Those weapons are half "elemental typed" damage and the other half is "B/S/P typed", which means there are a few situations in which they will perform very well, a few where they will perform worse, and all of that sits atop the existing physical limitations of their damage types. Their per-level damage output is inferior( ignoring the fact that half of the damage bypasses armor).
In a very real sense, I think they are balanced well, in that they are more situational than their mundane counterparts and there are a greater number of routes to limit their effectiveness.
However, they are situated in a tree full of goodies for caster, champions, getting champions, and making buildings that gets better the whole way to the top. This is opposed to a tree full of increasingly sharper and pointier sticks, which at the halfway point become essentially useless improvements.
In short, I think it is more accurate to say "pursuing magical weapons has a greater overall benefit to the outcome of the game than pursuing mundane weapons".