I referred to not being willing to replace meat in general, not beef specifically, due to the difficulty in getting a similar mix of nutrients, not to mention things that you can't get from vegetables, period. Here's a small list [https://www.healthline.com/nutrition/7-nutrients-you-cant-ge...] but there are plenty more. Sure, some of them are non-essential but those are pretty damn useful for general health, cognitive performance, and athletics.

Moreover, some of us respond poorly to carbs in terms of weight management and general well-being. I have ADHD and and a carb-heavy diet really messes with my symptoms. There aren't really any plants that provide enough protein without including a significantly greater amount of carbs so getting all of my calories from plants is a non-starter.

I forgot to elaborate on the emissions/calorie issue in my comment (there's that ADHD). The link in the parent shows that many animal-based foods compare favorably with popular vegetables using the emissions/calorie metric. Direct link to the chart: https://img.washingtonpost.com/rf/image_1024w/2010-2019/Wash...

It feels good to see some vindication on the animal farming emissions issue. It's a huge positive that we can lower our emissions footprint without resorting to a fully plant-based diet.