Monetary cost is the wrong y-axis here, as it optimkzes only for mega-scale farming without taking its real costs in consideration. It should be ‘true cost’, which also accounts for environmental-, animal- and climate mitigation cost. And subsidies.
What's the cost of an animal's life, human or otherwise?
I recognize you're trying to add in externalities that haven't been included, but determining a cost of life links it to some sort of utility, which I don't think it should be. Sentient lives should never be treated as a means.
I agree with you on principle, but this chart is economics-based, like it or not. And many people do think like that.
My point here is for them: this chart is not realistic. For example, it almost equates lentils with chicken. Even though chicken involves a lot more costs, including in animal welfare, societal, etc.
I'd have to ask, what do you mean when you say the "cost [...] of animal welfare"?
I agree the chart is unrealistic, but perhaps for subtly different reasons.
Surely there are some who would be happy to put a pricetag on the suffering of others, but on principle, I think such thinking should be avoided by vegans, regardless of if other people are comfortable doing so.