I'd love to know how it's easy to do, especially outside your home.
I have to buy expensive flours, gravy granules, stock, vinegars, soy sauce, pasta and bread. To me these are all staples of a healthy varied diet. I don't have the time/ability to make loads of my own stock etc and can't often afford the nice gf bread which is either uber expensive, uber time consuming to make or both. I don't always buy specifically gf versions of these things but often have to buy more expensive versions which can be incredibly difficult on a limited budget.
I cannot eat in a lot of restaurants/take aways on the odd occasion we go out and those I can eat in usually offer 2-3 options then you play russian roulette to see if you have d&v later. I cannot eat from a buffet at all. I cannot "grab some food" when out. I often take my own bread/pasta/entire meals to others houses. I have to explain to everyone I go see what I can and can't eat and why.
Breakfast and lunch I find a total pain and mostly live on naff tasting cereal (there's not just gluten in shredded wheat type cereals but also in corn flakes/rice krispies and similar even bog standard porridge is out) fruit, yoghurt (some, not all by a long shot) and salad (no crutons, no bacon bits) with cut meats/cheese (again have to check both meat and cheese for spices/bulking agents). Evening meals are easier as I can make my own staples like chilli, goulash, stroganoff, roast dinners, bolognaise, cottage pie etc. However even then I have to swap out pasta and yorkshires and check the gravy/spices.
None of this even covers treats like cake, biscuits, chocolate, crisps etc which are a law unto themselves.
I am still completely confused as to why anyone would choose this with no medical reason. For the record I am not a fan of making a child follow a strict vegan/veggie diet either. I feed my kids a balanced, healthy diet which includes some gf days and some veggie days but any choices like being vegan/veggie fulltime I will leave them to make as they wish and support them if they choose that diet.