I think it's reasonable for it to be a big deal to folks who have made a personal decision (for whatever reason) that they don't want to consume animal products.

Personally, if beaver butt is tasty, that's fine with me, but I respect the desires of other to avoid animal products, and think it's reasonable that such information be clearly disclosed.

Disclaimer: I didn't RTFA, and it's entirely likely this argument was made there.