clutch plate - rivets

The sketch in the previous post shows a couple of rivets. But why do they use rivets?

Especially these who connect the friction material with the other parts of the clutch. Because this is the place where power transmit from one part to another.

If the clutch is in function, so all parts are connected by a large force, the frition plates are pushed between the flywheel and the pressure group. But a part of the clutch plate is pushed between the two friction plates. So there is a friction force between the different parts of the clutch plate. Rivets are necessary to keep the clutch plate together if there is no connection.

Another aspect is that it is useless to disconnect the friction plates from the clutcht plate. If the friction plates are destroyed, the whole clutch is probably at the end of his life.
Its also a very easy connection, no turning tools are required