I've tried Mint along with 10 other distros. What I liked about Arch is:
Latest Kernel, always. This means new drivers, better support for your current devices and support for more devices. Security & performance patches.
AUR. Massive repo of user submitted apps & libs most not found elsewhere.
Arch WiKi. Everything you will need or want to do somebody else already did and documented it so everyone else can have a guide to do it. Best documentation site ever.
Arch Repo. Always the latest Software. Officially maintained apps and libs land first on Arch, Debian & Ubuntu derivatives take ages to catch up in comparison.
It's great having so much software available but the AUR makes me nervous because you really don't know who you're trusting when you install something from there.
Flathub has hundreds of apps which are not sandboxed and untrustworthy. So, no source is safe, and even most "safe" apps are not protected from supply chain attacks. So, you always have to be careful. But I agree there are certainly degrees of safety, and the AUR is certainly another one, which should not be taken lightly.