A lot of time people don't see how they can dominate their opponents in lane and think the game is hopeless. These people don't realize that you can lose the lane and win the game.
For example, sometimes I'll have unfavorable matchups as malphite, top, but as soon as I get 6 I roam to mid, ult the midlaner and get me or our midlaner a kill, setting that lane ahead. Then I go back to base, walk to top lane, push the wave off turret, get ult off cd, an tp bot lane, getting kills, setting that lane ahead. Then I got back top, and repeat mid.
I could be be doomed to lose any 1v1 versus garen badly, and he might get the tower earlier, but if I successfully translate my level 6 power spike into a team advantage, it doesn't matter.