Juries didn’t view it as wrong in past court cases. This was the first one to land a conviction, and they did it by putting a gag order on all the footage the activists took, which in previous cases was instrumental in swaying juries.
Juries acquited these activists of theft in previous cases, because they were shown footage of the awful condition the stolen animals were in. Which was why, in this case, the prosecutors dropped the theft charges, put a gag order on the footage, and instead threw a “felony conspiracy to commit trespassing” charge at the leader of the group, who didn’t even participate directly in stealing the animals.
But with animals, the state won't help them. If a baby was being tortured and the state wouldn't save them, how could you blame someone for taking it into their own hands?