It's not about the line of business. It's about disingenuously gussying up the marketing around their own profit maximization by pretending they're being humanitarian. Sort of like "Greenwashing."

Everyone does it, but so many people depend on subsistence farming that it comes across as especially crass. Sure they're not alone, but there is plenty of scorn to go around for bottling companies taking up all the ground water, Pharma companies abusing IP law to fleece sick people, etc. There's no reason to be stingy.