I don't believe you grasped the point. When someone begins a game, they agree to one game. A rematch is a second game, which can only be begun with the consent of both parties. Forcing someone to play a chess game is...kind of odd IMO.
They may also not be cowards. They may want to analyze. They may not have time for a second game. Even if they are cowards, forcing them to do something they did not agree to is, well, impolite.
You also point out that there is a rematch button. That is true, but there is also an analysis board button and a new opponent button. In-game there is a resign button. The existence of a button does not mean you need to use it.
@BearInBikini
They may also not be cowards. They may want to analyze. They may not have time for a second game. Even if they are cowards, forcing them to do something they did not agree to is, well, impolite.
You also point out that there is a rematch button. That is true, but there is also an analysis board button and a new opponent button. In-game there is a resign button. The existence of a button does not mean you need to use it.
@BearInBikini