It is true you get a bit more of control, to a certain extent, at least that's how I see it from my experience, I don't know, maybe you use some other options I didn't but the "archway" and the "non-archway" seem to achieve basically the same results in the end, at least from a regular-desktop user point of view; create partitions, hostname, users ... set timezone, language, passwords ... the one thing, and I'm not sure how important that can be is that using the archway you have to "genfstab" yourself, but it's the system which actually writes the mount options, not you, as far as I remember. Installing pkgs is pretty much under pacstrap control, at least for the basics; you have to install base and base-devel most of the time, you might skip base-devel but not base, of course. A GUI installer like yast installer from openSUSE does the same, and it's actually one of the most complete installers I've ever used, and it's not exactly "user-friendly", I mean, you have to play a bit with it before proceeding to install otherwise you might get confused on what options to use, once you know that, it's gets easier to understand how it works and what options do what. Calamares has evolved and it's a pretty good installer too. The Debian installer does a good job too, and you can choose to use the expert mode which is terminal based. And then you have custom/modified installers; MX-installer, Q4OS-installer, etc, etc ... I really enjoyed installing arch "the archway", but it was also a bit of time-consuming.Yes those can do the same but I felt that while installing Arch the Archway gave me more control over my installation
New Linux users usually struggle to extract information from their systems, back in the day I wouldn't know how to do it either, I was even accused of "help vampirism" once, which is just absurd but anyway, now I can solve pretty much any issue I may find in my OS without having to ask in any forum. There are users who make some effort to learn their systems, there are others who don't care about that and IMO use Linux just because they can afford a Windows license, but given the choice they'd use the MS OS, these users are not willing to learn anything because they think the OS should be ... something, not sure what lolthe reason they have that way of installing is that people asking for support on the Arch forums are able to actually answer questions(unlike here, where you have to ask the most basic questions before getting anywhere) when asked something because they know how their system is built and setup.