most go back on the road again so not going to make them rarer.

only the rotted,smashed cars get broken up then scraped.

when people spend thousands on their cars and then trying to try and recoup most of the money when the car is for sale,the car would have to sell for stupid money,then no one will buy it.

breaking it up in pieces will get you good money for the decent parts on the car and it will make you more money to do it that way,ok, its a pain to do but worth it imo.

and we all like to buy decent bits for our cars etc...