NOSSI'S PROFILE

Starting from Final Fantasy to all the goddamn RpgMaker-made-games I saw (god, I only played Italian games, but 't was only an example), I saw a thing: Skills have a fuckin' stronger form.
E.g.: Thunder. Uh, cool, a Thunder-Spell.
... Thundaga. Uh, a stronger version!
So Thunder'll be forgotten.

But... the characters have got a Magical Attack, Wisdom or whatever? So, WHY there are skills equal to each other, even if they deal more damage?

By working well, isn't possible to make only ONE SKILL per category, and STAHP?

Or am I writing nonsense sentences? Mboh.