I have been vegan for almost my whole life so, hopefully, qualified to address his responses.
1. Education around nutrition: they are both correct. While malnutrition is not an exclusively vegan concern, the idea that animal products are essential for proper nutrition does need to be dismantled in order for veganism to be more accessible. For example, at one time I qualified for WIC (a supplemental nutrition program for pregnant or nursing women, and for children under 5); many of the food vouchers provided were for foods that contained animal products, as they were deemed essential nutrition. While I was and will always be grateful for the assistance I received when I needed it, I was surprised that I could not substitute or exchange the vouches for plant-based alternatives, unless there was a medically-documented reason to do so, such as a dairy allergy.
2. Poverty: This is not about having the disposable income to buy Almond Breeze and Beyond Burgers, but about the very real obstacles faced by people living in poverty in the developed world, such as the only vegan option on the Dollar Menu being french fries. As someone who has lived in poverty but no longer does, I am acutely aware of the resources it takes to maintain a balanced vegan diet; poverty derails all of those resources, specifically money and time. This is especially true for parents living in poverty, who also have to worry about the resources needed to meet the nutritional needs of growing children.
3. Negative relationship with food: Oh, sweet summer child. I adore his innocence to the fact that many young people, particularly young women, adopt veganism as a way to hide their eating disorder, or have an eating disorder triggered by restrictive dieting practices (ie. veganism). Myself included. While I no longer have the end goal to be a breatharian, I still am absolutely obsessed with every morsel of food that crosses my lips. While I am privileged to be able to be that picky (more on that in point 4), I now have the life experience to realize that I have to do so in a manner that allows me to meet of my nutritional needs.
4. Food Banks: I'm not sure what "struggle food" looks like in India, but in the United States it tends to be heavy on cheap, shelf-stable animal products. The 1 year of my adult life that I consumed animal products was the year I was homeless and couch-surfing, with the bulk of my diet coming from local food pantries and the dollar store. When one is facing food insecurity, it is incredibly hard to avoid animal products when you are limited to such foods as canned ravioli or beefaroni, canned baked beans (the pork and beans kind), tuna, deviled ham/potted meat, Vienna sausages, shelf-stable milk and cheese. There was virtually never fresh fruits or veggies (my "greens" were often times dandelion leaves picked from the sides of the road), and bags of dried rice and beans assumes that the recipient has the facilities and potable water to prepare them, AND refrigeration to store them after preparation. With that said, while he offers NO solutions, I applaud and respect that he address toward the end of this point that ya gotta do what ya gotta do. I feel zero remorse for my year of animal consumption (although my intestines felt like they were telescoping into themselves) because I too am an animal; no one shames a lion for devouring a springbok, so why show any less grace toward a human animal who needs to survive on what resources it has?
I am in a very different place in my life now. One where I am privileged to have the resources to shop in bulk to purchase and store a ton of fresh produce and wholesome foods; to have another meal to eat while I wait for dried beans to soak overnight; to have a few hours free on weekends to meal-prep for the coming week; to keep an expensive canister of vegan protein powder on hand in case meal-prep gets derailed; a spouse to prepare non-vegan options for himself and the children, so I'm not cooking two separate meals every night, or simply giving up out of exhaustion to consume animal products.
Social Barriers: I absolutely with him, but maintain that vegans who are more financially-secure have a duty to make veganism more accessible to those less fortunate. I don't forget where I came from, so all of my food pantry donations are nutritious vegan staples, which can be consumed by even those without kitchen facilities.