Not sure if you're joking - but vegetarians / vegans tend not use use any product which is made by killing an animal.

People can argue about whether shearing a sheep or obtaining shellac is harmful - but I think everyone can agree that there's no way to extract the liver of a shark without killing it.

Virtually every product is made by killing animals. I'd say vegetarians/vegans only really care about products that ~require~ the killing of an animal, and care very little about the products that only kill animals incidentally.

Thank you for telling me what I care about. Incidentally, how does one extract the oil from a shark's liver without killing the shark?

Vegans used to not own pets as that was deemed immoral. And now they do. The goal posts keep moving.

Vegans aren't a collective entity. Pets can be adopted.

> Vegans aren't a collective entity.

It's still human dominion over animals. And veganism is still veganism. e.g., don't tell me that "some vegans decide it's OK to wear leather" because they're not "a collective entity" or something like that. Veganism is very much a black & white ethos. There is no acceptable gray area for veganism.

That's completely wrong. It could refer to a diet, a philosophy, or both.

https://en.m.wikipedia.org/wiki/Veganism

Maybe not (unless you want to get at that 'roid from the long way around) but some people are vegetarian because they want to avoid killing animals as much as possible. It seems that shark liver oil comes mainly from sharks already considered "vulnerable" by the IUCN[1]. I'd feel weird about rubbing the liver oil of a top tier predator on my ass now that I think about it.

[1] https://en.wikipedia.org/wiki/Shark_liver_oil

It's just a longer path towards its destination.