I'll stop there. I'm not interested in continuing this discussion when it's being conducted in bad faith.
Rather than argue with those of us who are pointing out messy realities, this commenter might be better served filing a bug against any number of the projects that offer installation this way, asking them to remove it, and see if it lands any better.
Technical purity/superiority isn’t the only factor, or even the most important one, driving projects to offer quick installers like this.
I would also appreciate it if you actually talk about something concrete rather than simply claiming to be right. You shouldn't pipe stuff from the internet into your shell.
Are you claiming that's about some highfallutin "technical purity"? Is it technical purity to check inside the bag when you buy a pig in a poke? No, that's common sense. It's common sense to have some degree of knowledge about what programs you execute on your computer. As root, at that.
Nobody would argue that it's categorically safe/good/smart to blindly pipe a script into your shell; and for the record, I agree. I would also readily agree that habituating users to doing this probably creates new, more general risks especially among how less-technical users interact with their CLI.
However, the realities of the "real world" make it popular for a reason, in light of those negatives; tons of scaled projects continue to offer a 1-liner. So we have to ask, why? They'd probably say that's because it (a) improves project adoption, and (b) reduces "install broken" tickets.
You have to address the non-technical merits and goals to get behavior to change here, and sadly, I don't think anyone has done that.
But who cares about me? I'm not currently maintaining one of these (though I did once). My suggestion to bring your argument to an active project was genuine: try it! I'd be delighted to see you bring about the change you want.
[PS: The commenter I replied to originally used the term "bad faith", which they've since edited]
I am arguing in good faith about the merits of the approaches. I am engaging with the points of argument being brought up from the opposing side of the argument (see above). I am not veering off on side-tracks, unlike you, for example.
There' a simple good faith argument (that I have been making) which you can try responding to: Running arbitrary code from the internet without checking is bad. There is some effort needed to package software, but that is not that much effort in the grand scheme.