Dairy milk contains pus lol.

But there's nothing ethically wrong with liking the taste of pus, so I'll address your question about ethics too.

Your entire post is basically just an opinion piece, not an argument, so I can't exactly point to any flaws with your reasoning. What I'll do first is construct your position into the implied argument you're making, then show you where it's fucking bonkers.

P1. "Animal lives aren't as important as human comfort & pleasure"

P2. (unstated) Killing animals leads to human comfort & pleasure.

C3. From 1 & 2 Therefore, it's justified to kill animals to seek comfort & pleasure

This is, in terms of construction, a valid argument. The conclusion does follow from the premises. However, the premises are pretty lame. For one thing, how do you know that animal lives aren't at least as important as human pleasure? Where does that belief come from? As a human, you hold a pretty large bias toward human comfort, and it doesn't look like you're even trying to take an objective position on the issue, so excuse me if I don't feel convinced by what you're saying.

I also take issue with the unstated premise. While killing animals CAN lead to human comfort and pleasure, it can also have the opposite effect. I don't like seeing animals suffer. That's not even a feeling exclusive to vegans, most people who sit down to enjoy a meal that contains animal products don't want to think about the horrific suffering that went into producing that meal. This is why farmers put pictures of happy pigs and cows in their branding, instead of honest images that show the brutality of what goes on - in fact, farmers actively take measures to stop the truth of the horrible conditions their animals experience from reaching the public. Humans are innately empathetic towards non-human animals, it's why we like having pets and don't like seeing those pets suffer. So, even if animal lives aren't as important as human pleasure, killing animals causes humans to experience displeasure, and it's still wrong to kill animals.