If the writer had the benefit of seeing the few-post outrage on the 25th, they probably would've written the article differently, and maybe also reflected on the dynamic with the workers.
In a startup, when you have to do all the things, and you're constantly learning, it's easy to miss some things. Also, a lot of the funded tech startups are of founders of rich parents and sheltered upbringings, for various reasons. So (like all humans) they often have little understanding of the situations of people who are not them, and therefore little automatic empathy for the not understood. Often (this can also be normal human reaction), they will implicitly imagine themselves as deserving whatever privileges they have, and therefore having superior merit over others who don't have that. So, without reflection, one might accept the situation of one person calling themselves CEO at 20, and taking the lion's share of the entire effort's wealth, while another person is belittled and treated like shit, since (the implicit belief goes) they both must merit their lots in life.
Unless and until we stop and think about it. I think that most people here on HN, when we're distracted from empathy, by all the commotion of all things we have to pay attention to, will care once it's pointed out. We stop and reflect, and then we try to learn and do better.