Summoner's "I Want to Continue All Things"

One day, I suddenly traveled to a strange world, where everyone can not only see their attribute bar, but also gain skills and improve their level through exercise and learning? Isn't this just because everyone has their own system? Fortunately, I can go to other worlds to practice! But who can tell me why I, the Summoner, have to use my hands to blast the enemy? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.