The cards reflect life. I don't want a sanitized tarot that gives me gentle affirmations in every card because it assumes I can't take the fact that life is hard, unfair and dangerous. I prefer cards that reveal to me the cruel sides of life, too (and leave it to me as querent and/or reader to find the silver lining if there is one).
It's possible to depict them symbolically or in abstract shapes and colours, but they'll still be tough.
I don't see the WU's bull or the Shadowscapes' swan as real animals suffering. They are not. They are symbolic depictions.
I don't want animals to suffer. I collect street cats. I don't eat meat (since 1976). People are different so I can't tell others to have a good look at that swan if they feel so horrible about it. It's everybody's personal matter.
I read sometimes that on American campuses, you can't discuss certain kinds of violence in academic contexts without trigger warnings and diplomatic circumscriptions, and sometimes such topics are banned completely. I don't know whether that's true, but I find it baffling. Research and discussion of these topics are necessary to help understand, combat, prevent them.
And are all these students who can't even listen to an academic discussion about violence really never exposed to Game of Thrones or James Bond movies etc? Don't they watch TV or movies? I find that hard to imagine.
I find the violence for violence's sake in some popular-cultural products much more worrying than tarot's unflinching confrontation with Death and Devil.
As humans, we have good and bad potential. Both is part of our lives, our culture, it's reflectee in the cards, too.
And concerning animals: if we're not vegans, our bodies are fed through the suffering of cows, bees and chickens. Even if we're vegan, our ancestors have used horses, cows and bees, have worn fur coats, fished in streams or the sea....
None of us is blameless. As humans, we are aware of this legacy, we can justify it (humanity did it to survive etc), but it still shows that we don't accept animals on the same moral Kantian level as humans. And how bad are humans to other humans?
No, I don't want tarot to be an island of peace and harmony. I can take the Star card and meditate on it if I wish to. But if the Tower is coming to me, and I pray it doesn't come to anyone, then I want my tarot to tell me so. If it needs a cruel image to tell me what I need to know, well, that's fine with me.