'cos it's easier for an office worker in Brussels with no farming experience to make one big rule than to work on real individual risk!
That's why it is also illegal to feed kitchen scraps to chickens - easier to say nothing from kitchen than to recognise that chickens don't get foot and mouth
That's why it's easier to say everyone has to clean out their trailer after transporting livestock than to recognise that my trailer has been from farm to abattoir, that only pigs got off, and nothing got on, and that it'll be at my farm until the next time.
That's why young pigs move on a pointless temporary mark that serves no purpose.
That's why you need to take a pathetic exam to move your pigs over 65km
That is why you have to provide "lateral protections" to your trailer ramp, despite that most smallholders transport in a P6e which has a maximum height that pigs could fall off the side of a foot.
That is why... etc.