It’s not that genuine passion and altruism isn’t acknowledged; the entire open source software world is a testament to that.
You asked for an explanation as to why Free modern hardware hasn’t been developed yet. The simple answer is that passion and altruism has not yet been a strong enough incentive to motivate anyone to do it. He’s not accusing you of being lazy or hypocritical. The reason why you haven’t done it yet is the exact same reason why anyone else who could do it also hasn’t done it yet. It’s very very hard, and passion doesn’t pay the bills or feed you. Limited to a hobby, it’s simply more work than most people could ever hope to achieve in their spare time.
The funny thing about Lemmygrad people is that you could tell me that this comment was an intentional caricature and it’d seem just as likely as it being genuine.