>>2825059
its just to sell more
they generally used to be made of metal, but they lasted decades, so less were sold
there were thousands of mouse trap designs on the market, but now when you look for ones available, its only ever like 5 main designs, which are either made of wood that rots or splits, and plastic which sears after multiple uses or isn't sensitive enough to work well

imagerelated is actually one of the very few metal mouse traps i've seen still available (though amazon)
the only other one is a copy from a different company thats lower quality