Is it permissible for a veterinarian to treat pigs and perform surgeries on them if this is a mandatory part of their postgraduate studies abroad?

Treating pigs for training purposes is forbidden in Islamic law due to the cooperation in sin and aggression with the disbelievers who wish for the pigs to remain to be eaten, which is unlawful. It is originally prohibited unless Muslims are compelled to do so and this is the only way to learn the medical profession they need. In this case, there is no sin, because a means to a forbidden act becomes permissible if it leads to an overriding benefit, and necessities and benefits have a significant impact on Sharia rulings.