There is obviously a lot of effort put in it. The idea behind it is so cool. He shared and put it up. That's very good.

But unfortunate part of sharing is also receiving criticism.

Sometimes criticism is stronger when the initial expectation is higher. I think most clicking that link got excited about all the features they read before then they got disappointed when they saw that piece of code.

So his job is not to babysit other techies, i.e. he doesn't care about how others see this project, so then he wouldn't mind the criticism either, right?

Indeed, but criticism is subject to criticism too, specially if perceived as latent cynicism.

If the headline were not so ridiculously conceited, I would agree with you entirely.