Vegetarianism is a luxury?
Yes it is, sometimes, based on the criteria in the post you are replying to.
They even give examples of why this is and point out not everyone has the same circumstances you , but you still somehow read it as your own personal position being the only correct one.
To be clear, that's vegetarianism, not vegetables.
Access and "cost effectiveness to nutrition ratios" are skewed towards meat in some places, especially when looked at from a socio-economic point of view.
Per calorie, meat or "meat" can be cheaper, especially when you factor in time/effort taken for purchase, storage, prep and cooking.
That's almost certainly because of the focus on meat production in some countries and you could argue that it shouldn't be that way, but that's a different conversation.