DRAW:Timeout Vs Insufficient material

hello guys! recently in one of my games I was going to win my time out, and as my opponent's clock ran out of time, instead of a win it came Draw timeout vs insufficient material. I understand the concept of timeout vs insufficient material but dont you think that the rule is unfair? it should be my opponent responsibility to act fast. if that is not possible, he should play games longer time. My opponent had a rook, and I had only a king. he ran out of time. so the victory should be mine right? this rule cannot be changed, but doesn't it seem very unfair? Tell me in the forum post below. Also one more doubt. i had a pawn and my opponent ran out of time. it was a draw. my pawn is counted as insufficient material? but ut can be promoted right? please tell me the answers in the section below. THANKS FOR READING!😀😆

Insufficient material happens when someone runs out of time in a position where the checkmate is impossible. If opponent runs out of time in a position where you are a pawn up which is possible to promote under any sequence of moves and then checkmate opponent - you win.