You are talking about vegetarian diets which can still include a degree of animal cruelty if from dubious sources. And nobody is saying people need to eat meat...but people in poverty are allowed that choice too .
They are - but it's still a choice, and what I said equally applies to vegan food.
Fwiw - I have been on a very low income having to feed picky children on a very low budget.
Also - there are choices which vegetarians can make about the welfare of animals producing dairy or eggs that they eat as well. I only buy organic animal products now, and I sincerely hope this means that they are not living shitty horrible lives while producing stuff that I eat. And I spend less buying organic milk, cheese, eggs than I did when I bought non organic and also meat products.
Scrowy what you describe re.using cheap cuts from good sources sounds great and all the TV chefs go on about it, but I was always frustrated to find when trying to follow their "money saving" advice at the supermarket was impossible - even if they had the cuts they weren't cheap as the TV chefs had lead me to believe they would be. What you say makes so much sense.