Earlier quoted context omitted.
It seems more an attack specifically on 'viral' licenses like the gpl than on oss in general.
viral how? You think it's morally ok to just use others work without contributing back any improvements/disclosing it to make money?
However, if you would like an argument, then yes. Or, rather, I think it's morally ok for people to make software under any license they choose, including licenses that allow big companies to use their work. Personally, I use bsd-3 for most of what I write, and I support other people who do the same. I also bear no ill-will to people who use gpl or apache or mpl or what-have-you.