Arch and Mint target a different user base. Mint is more appropriate for the beginning Linux user who wants to wade slowly into using Linux. It’s for somebody that is coming from an entire GUI experience like Windows. This person may have no understanding of partitions, filesystems, bootloaders, etc. Arch is going to be more appropriate for either an intermediate to advanced user of Linux that wants more control over their installation or a Windows user that understands the more complex topics around the way a computer operates.
The above said, it is very possible to do advanced things with Mint as well and I have in the past. I just want to have a leaner system that does not make assumptions about what I want or need. I want fairly strict control of what goes into my installation but not strict enough that I would need to do something like Linux From Scratch. Both Mint and Arch are excellent distributions! In fact, I would go as far to say as I like all open source operating systems and software by the nature that they’re open sourced. They can be customized, expanded, etc. I would also advise people to mix some FreeBSD and OpenBSD in their homelabs if possible because the more you can learn, the better. OpenBSD is my firewall and advanced router. FreeBSD powers my blog. Arch powers my desktop and Mastodon and Lemmy instances.