Turkish chess - this doesn't make sense,

In Turkish chess only pawns can capture and pieces cannot.  However, pieces can check and checkmate the enemy king.  I don't see the logic here - if pieces have no ability to capture, how can they be a threat to the king?  A gun that isn't loaded or a toy gun isn't a threat, right!

Perhaps they scare the King to death by just aiming the gun at him?

Well, if chess pieces have feelings...

Since Chess is a simulation of a medieval battle, and the characters the pieces represent no doubt had feelings in real life (perhaps with the exception of the Rook), it should not surprise anyone that the rules for the behavior of the pieces are designed to reflect such feelings...

But what if the king knows that pieces cannot capture?  Then it can just sit comfortably and laugh at their "checks".  Another thing, if pieces work together with the dangerous pawns, and they do their best to restrain the king so that it can't escape the pawns.

Then the rules would have been different, and it would not have been Turkish Chess.