Because they occupy so small disk size that they don’t matter and it’s easier to have it and not need it than need it and not have it. I wouldn’t call hardware support bloat ware.

Also, just so you know, Arch has Bluetooth and wifi compatibility even if you don’t install the packages, Gentoo does not. You would need to recompile your kernel with the correct configuration to enable those for your specific card.

Arch is just as bloated as Fedora, Mint or Bazzite. Hell, my Arch is a lot more bloated than any of those. This is Linux, the system is as bloated as you want it to be, but also having stuff installed doesn’t necessarily causes your computer to be slow, programs only execute when you tell them to.