The whole (hole) thing is planned obsolesence. The seat is supported by the hinges and the front pads, so all your weight is pushing down ithe middle of the seat sides. Think of a bridge with your bottom putting the load in the middle on two beams supported only on the ends.
After having a Concerto seatactually break in half on one side, the side you stress when lifting to wipe I found that is made of compressed resin infused sawdust!! I used front pads like on the sides positioned to provide support to the middle of the bridge. Viola an infrastructure fixed for less than Congress would spend.
Simple fix and maybe I'm nuts but buying $100 toilet seats...weird size you know, just was another challenge in this sport.