You're arguing here as if there is an argument to be had. I'm trying to help you understand that there is no such argument. Your claims have been considered and rejected hundreds of times over the last 10 years. It'd behoove you to consult the search bar below and read some of those old discussions. This isn't a case where the community made a rash decision and just doesn't realize how problematic it is; you're talking about what is probably the single most deliberate community management decision HN has ever made. It's not going to change.
A moment later
Maybe it'll help if you get your head around the goal of HN. There are a bunch of things you personally seem to want to accomplish with HN. But HN itself has just one goal: to nurture curious conversation. Other sites have other, equally valid goals: propagating the news as quickly as possible, or relentless focus on a particular topic, or getting the best Q&A pairs to the top of Google's search results. HN, though: curious conversation. That's the whole ballgame.
Anything that drags on curious conversation is a non-starter on HN, even if it might make a bunch of things better for you.
We don't have to guess about whether making comment scores available is a drag on curious conversations; it manifestly was, for years. People have an innate, visceral reaction to comment scores they feel are unjust, and they talk about them, and those conversations choke the landscape like kudzu.
A lot of things about HN make more sense when you accept the premise of the site, and understand that HN will make most sacrifices it can come up with to optimize for that premise.