The purpose of the time limit is to allow players to actually have the choice of using that limit. If I choose to move in a game that I have 10 days left to move before I move in a game that I have 3 days to move that is my choice.

For instance, some games take longer to decide where to move. Whereas Ludo or some other games don't require too much thought and I can move pretty quickly.

Time wins are wins. If you don't like losing on time then play with longer time controls. You can't blame the other person for not moving faster if he has plenty of time on his clock.

If you do like slow games you can check out Slow Time Controls fellowship and play as many slow games as you want.