Earlier quoted context omitted.
What do you mean by category error? All he says is that poor people can succeed at startups, too. How is that making a category error?
It’s not all he said. He also included his anecdote about the AirBnB founders. It’s a category error in that his statement is a binary one i.e. true/false, which he is using to defeat arguments which are about continua. That is a category error. It’s also a common method of deceptive persuasion - i.e. a dark pattern, but I don’t think PG was doing that on purpose, hence my assumption that it was an error.
And isn't he just providing one example, it seems too much nitpicking to me to then go on claim he made a categorcial assumption based on an example of one?
Maybe the AirBnB founders were comparatively poor. You can always find somebody poorer, and even too poor to do a startup. Like if you have no money, no arms, can't talk, you may be so poor that doing a startup might become difficult. Yeah - OK. Poverty that makes it impossible to do a startup does exist. Doesn't mean that most people couldn't do a startup.