Idiot?

Cuz it can't fill your stomach?

In the long run, that perfect item for his playstyle, and its usefulness in general would be so ridiculously good

but is it an absolute necessity?

No, but it would be a completely ridiculous advantage

Judge from his commend. He can simply craft it from material on higher level.

i think its because if he kept the item then people would still call him lucky boy coz he started with an op item
He knows how to get it again though so if he acquires it through that way ppl's doubts wouldnt exist

I think it's because people would constantly target his life in and out of the dungeon because he has a rare item.