[jampekka]

The scale is highly relevant for environmental issues.

https://ourworldindata.org/global-land-for-agriculture

Edit: replaced scattered numbers with a proper source.

[margalabargala]

The scale is only relevant when adjusted for animal size.

Raising and eating 10000 shrimp is a lot less impactful than raising and eating 10000 tuna. Counting them both as "one animal" means environmental issues is not something the page cares to illustrate.