Let them practice in peace.....how would you like it if you were "in the mood" and your mum or dad kept interupting you?
If the fish are being physically injured then by all means sort the sharper parts of the scaping but if they are just making themselves scarce, leave them be. Not all fish are social butterflies with their humans, some are often hidden from view til they feel comfortable to venture out. Having human hands ferretting about in their home is stressful for them.
One of my Rams is a shy kid, hardly ever ventures out abd about but he is happy and healthy so I won't move the decor just so I can see more of him.