On the other hand, in a sense many of them are, except instead of gunpoint it's economics that mean their clothing choices have a hard dollar limit on them - and at the end of the day, it's better to have a subpar t-shirt than no t-shirt at all.
So I don't think anyone is being hurt here. At worst, the person you're replying to could have done better by donating the shirts to a charity that doesn't sell the clothing, but gives it away.
Anyway, I hope you made yourself feel good with your comment, even if you didn't do any good.
1. other people may not feel the same way about the material
2. somebody else one or two sizes smaller might be able to make routine use of it with some other garment underneath
3. somebody else might feel it's fine for emergency use or painting and decorating or whatever
4. could come in handy for use with an animal
(Or "One man's trash is another man's treasure").