I agree that $50 shouldn't be trivialized. That being said, in America that's well below the standard for a month of groceries for one person (unless they're eating all of their meals out or something like that). Here[0] are the USDA food plans with budgets for "food at home". The cheapest category is "thrifty", and even there they budget about $100 per month for a one year old through about $190 for an adult male (those numbers increase by about 20% if it's a one person household rather than a contribution to a family budget).

I don't know how those numbers might compare in France, and there are obviously cheaper parts of the world, but the person trivializing $50 might well be in America where that's closer to a week's grocery than a month's for one person.

[0] https://fns-prod.azureedge.net/sites/default/files/media/fil...