> If you're not qualified to use a tool correctly it's not the manufacturer's fault, it's yours.
It certainly _can_ be the manufacturer's fault, if the manufacturer's salespeople lied to you about the learning required to master the tool.
I think the point of the article is that collectively, as a community of experts, we have been misguiding non-experts into thinking that C++ is a good tool for their job.
A non-expert cannot make an informed decision on which tool to use, they _have_ to rely on advice from experts to pick their first tool, so if they feel like we're recommending C++ (and I agree with the author that this is not a good tool for non-experts), then that's, in a sense, on us.
(That being said I did not inspect the code, so I don't know if the author's implication is right that C++ is the core problem of the code base)