I think it boils down to not trusting you to argue in good faith to begin with

You don't have to trust me to act in good faith.

actually explaining why you think herbs and spices are bad for you.

Some people are allergic to some spices, some people are allergic to chemicals on herbs and spices, especially pesticides. Most people can tolerate them just fine, but they are unnecessary and something some people will have to avoid. Some people can tolerate some plants, but not all people can tolerate all plants. I'm fairly sure this was already said in the spice cabinet meme thread you responded to.

The average person only needs to eat 500g of food per day. This still wouldn’t work for anyone in a country about 4.5 times as densely populated as Australia, which according to wikipedia is… 219 of them out of 244.

Don't let perfection be the enemy of progress - animal nutrition is foundational to human health.