People consider vegans on Lemmy as too preachy. Even in vegan communities here, mods have to remove soooo many inappropriate comments (I read a few of these and they keep getting removed for good reasons). Comments that suggest going vegan on posts about animal abuse are downvoted.
At the same time, whenever there is something about Windows or Chromium based browsers, people here are doing exactly the same. “Just use Linux/Firefox/whatever”.
This comment might be a good opportunity for self reflection. You asked a question as if you were interested in good faith dialog, but then instead of trying to understand others point of view you’re just arguing that you’re “objectively” right and they’re wrong. You even admit at the end of this comment that you weren’t really interested in hearing what others had to say, you just wanted to shout your “point”. Another word for that is preaching.
Regardless of the topic, that kind of approach is going to rub people the wrong way. To answer your original question that is why people get annoyed when veganism comes up - because it’s often brought up in the hostile and preachy manner you’re employing in this comment.
Based on my past interactions with people who want to talk about veganism on the internet, I’m guessing you’ll just jump down my throat again in a response rather than consider what i said, but just maybe this will get through to you. Since you weren’t interested in dialog, I’m not either - I won’t respond so don’t bother trying to tell me what you think in a response.
Of course I had a few assumptions before but I asked as some form of discussion to see if I am wrong. Some people had good explanations and I upvoted them, even though I don’t agree.
With this objectivity thing: I was just pointing out that there is a HUGE difference between ethics and morality. So most vegans I know draw conclusions from general concepts (e.g. life itself has some value so killing is bad in general) but I do think other people might draw other conclusions from these or other concepts (and I want to argue with them about their conclusions) so it’s not about being objectively right at all.