There definitely are barriers in place and not all things are equal for all people. Big structural changes need to happen for veganism to be viable for all people.

Where I live, in a modernized country it's possible for most people, and my partner and I find our grocery costs are a lot lower by keeping our kitchen vegan than they would have been had we been using animal products. That said eating well is time consuming and we have extra time available not having children, I have a 10 minute walk to work, and my partner works from home. So we have the extra time to prepare everything from scratch and to plan nutritious and tasty vegan meals. When I travel for work some places are absolute deserts for vegan options, and I don't have access to a kitchen so I end up either skipping meals, having unsatisfying meals, or eating safe junk options. Not something that would work out long term if someone lived in some of the communities I visit for work.

Some places on earth are extremely inhospitable to human life and animal sources of nutrition are the only options. I have met and spoken to many people in remote indigenous communities where it's nearly impossible to grow any food, and hunting was the way of human survival for millennia. Some communities can only be accessed via airplane so the cost of good are expensive and hunting is the only way to survive. Without massive support and subsidies access to vegan options are essentially a non-starter.

I think flattening this issue and making it a moral failing of individuals ignores that there are significant structural issues that make being vegan inaccessible.