It's not a strawman argument. My response (which wasn't to you) was triggered by the notion that we "need to normalize paying for foss". I don't think that's true, and I do think it'd lead to generating a "tipping system". Plus, again, not what the linked article is driving at.
I'm also not fond of "we live in a system" as an argument for playing by the system's rules. I mean, by that metric people should just charge for access and call it a day, that's what the "system" is encouraging. We need sustainable flows of income towards FOSS, but that doesn't mean step one is normalizing end users feeling obligated to pay.