It should be like this but its not that way.. There are way too many weapons which gives the stat bonus which isnt even required for it.

For example raum gives STR instead of DEX.. There are many more weapons like this which gives stats which isnt even required. I always thought of asking them to change but dont know if they'll do it. Cause boost in that much stats could change alot of things..

might sound weird with Dex Bonus on a sword...

but TSword has always been like this.
There is also Dex Bonus on Giantic Axe and other str items...

Like Birdie said.
If we make it 10str...it would be to much ahead of Daxe.
We could just delete the dex bonus...but its easier to keep it