your argument against veganism is

Being at the top of the food chain does not give humans the right to exploit and harm other animals for food. Many animals that are raised for food are subjected to inhumane conditions and painful procedures, and the production of animal-based foods has significant negative environmental impacts.

Claiming to be at the top of the food chain is not a moral argument. It's simply an affirmation of "Might makes right" — the principle behind the worst atrocities and crimes of human history.

Additionally, it is not accurate to say that humans are at the top of the food chain, as the concept of a "food chain" is a simplified representation of the complex and interconnected relationships between species in an ecosystem.

In reality, different species occupy different niches in an ecosystem and may consume a wide variety of different foods. For example, a lion may be at the top of the food chain in its ecosystem, but it may also be preyed upon by other species, such as humans or hyenas.

Ecologists used a statistical method of calculating a species’s rank in a food chain based on its diet. Their findings, published in the Proceedings of the Natural Academy of Sciences, scored humans at 2.21 on a scale of 1 to 5, roughly equal to an anchovy or a pig. On the low end of the scale are primary producers like plants, and on the higher end are pure apex predators.