I don't recommend it for first time users. Going through the install process is basically the tutorial level for Arch. The arch install scripts are for shortcutting an install process you're already familiar with. If you want arch with a no pain installer use something like EndeavourOS.
For example, I've used Arch for years, and tried experiment with BTRFS using the archinstall script. I deeply regretted it because it didn't configure SWAP correctly so my laptop couldn't hibernate. I had to rip out zram and put in a swapfile.
You must have an idea of what its going to do before using it. In the case of you're bloated KDE install, it installed the full kde package group, which almost no one wants. You could use the archinstall script to install everything but the graphical environment and then do that yourself, post install.